HVAC Preventive Maintenance Checklist
Scheduled HVAC maintenance by frequency, with the two seasonal changeovers that actually decide whether a summer or a winter goes quietly, and the filter and belt sizes written down so the second visit is not a measuring trip.
- Forty-six tasks across monthly, quarterly, seasonal and annual
- Cooling and heating start-ups as separate visits
- Filter, belt and consumable sizes recorded once, with part numbers
- Twelve readings carried forward, so the trend is visible not the number
HVAC Preventive Maintenance Checklist
By frequency, around the seasons
| # | Cooling season start-up task | Done | Reading | By |
|---|---|---|---|---|
| 1 | Clean condenser coil, checking fin condition and straightening | |||
| 2 | Verify refrigerant charge by superheat or subcooling, log the method | |||
| 3 | Verify crankcase heater operation before the compressor is called |
The document you will get. Download for the full, editable file.
Who this HVAC PM checklist is for
One unit, one file, and three people who need different things out of it.
The technician on the visit
You work only the frequency sections that are due. Monthly is deliberately short, because a monthly list nobody can finish in twenty minutes becomes a monthly list nobody does.
Whoever orders the parts
The consumable register is the reason you are not guessing. Sizes, quantities and part numbers recorded once turn every future visit into one trip instead of two.
The engineer reading the trend
Section 8 is yours. Twelve readings against the last visit and the baseline, where the direction of travel matters more than whether today's number passed.
The building or contract manager
You need the visit summary: task completion, deficiencies raised, whether the unit was left fully operational, and what is recommended before the next season.
Which section matters the most in your sector
The tasks are common to most packaged and central plant. What changes is which season carries the risk and how much notice you need to work at all. If you run one of these, the sector page goes further than the template does.
- Data centers
Cooling start-up and the readings table. Where cooling is the process rather than a comfort service, approach temperature and superheat trends are early warning rather than housekeeping.
Data center maintenance software - Healthcare
Heating start-up and carbon monoxide detection. Occupied clinical areas cannot absorb a heating failure, and the combustion checks are the ones that prevent it.
Healthcare maintenance software - Retail and malls
Filter register and access. Rooftop units above a trading floor are reached on somebody else's schedule, so a return trip for the wrong filter size costs a whole visit.
Retail maintenance software - Corporate facilities
Monthly tasks and occupant complaints. In offices the first sign of a fault is a comfort complaint, and the monthly setpoint check is what connects the two.
Corporate facilities software - Education
Seasonal timing against term dates. The changeover windows and the quiet campus weeks rarely coincide, so the start-ups have to be booked well in advance.
Campus maintenance software - Commercial real estate
The visit summary. Across a multi-let portfolio the unit left fully operational line is what a tenant conversation eventually turns on.
Portfolio maintenance software
What an HVAC preventive maintenance checklist should contain
An HVAC preventive maintenance checklist is the scheduled service record for one heating or cooling unit, organized by how often each task falls due. It covers monthly, quarterly and annual work plus two seasonal start-up visits, records consumable sizes and benchmark readings, and turns anything found into a corrective work order.
A. Fields specific to an HVAC PM checklist
| Field | What goes in it | Why it earns its place |
|---|---|---|
| Equipment details | Type, make, model, serial, capacity and how it is reached | Location and access equipment belong here because they decide how long the visit takes. A rooftop unit needing a harness and a second person is a different job from a plant room. |
| Refrigerant type and nameplate charge | Recorded, not calculated here | The reference figure for the visit. Anything actually added or recovered is a legal record and belongs on the HVAC work order with the cylinder details, not in this checklist. |
| Criticality and PM frequency | Whether comfort or a process depends on it, and the interval chosen | Frequency set per unit and justified, because a critical unit on a routine interval is a decision nobody made deliberately. |
| Filter, belt and consumable register | Item, size, quantity, part number, last changed and next due | The single highest-value section. Sizes recorded once mean the next visit carries the right parts instead of measuring and returning. |
| Six monthly tasks | Filters, condensate, noise, setpoint, alarms and clearance | Kept deliberately short. A monthly list that cannot be completed in a short visit is a list that quietly stops being done at all. |
| Ten quarterly tasks | Belts, alignment, lubrication, blower, connections, amps, capacitors, contactors | The electrical readings here are the ones that catch failures before they happen, particularly running amps against nameplate and capacitor microfarads against rating. |
| Cooling season start-up | Ten tasks, run before the cooling season | Coils, charge verification by superheat or subcooling, leak evidence, fan balance, head pressure control, crankcase heater, tower and chilled water flow. |
| Heating season start-up | Ten tasks, run before the heating season | Heat exchanger, burner and flame, ignition and lockout, gas pressure, combustion analysis, flue, safety controls, carbon monoxide detection, heat pump defrost and boiler treatment. |
| Ten annual tasks | Ductwork, economizer, static pressure, balance, calibration, interlocks | The system-level work that only makes sense once a year, including verifying airflow against the original commissioning figures rather than against habit. |
| Twelve benchmark readings | This visit against the last visit and the baseline, with a trend | The comparison is the point rather than the number. Three consecutive moves in the same direction is a finding even when every individual reading passed. |
| Deficiencies with a corrective work order | Item, description, severity and the job raised | A deficiency that leaves without a work order number will be found again at the next PM, written the same way, by somebody who assumes it is new. |
| Visit summary and close | Task completion, unit left, parts to order, next seasonal visit | Task completion below full needs a reason recorded, because partly done PMs are how a unit accumulates years of signed paperwork and then fails anyway. |
The two seasonal start-ups are worth more than everything around them, and the reason is timing rather than content. A cooling start-up run in April finds the failed crankcase heater, the low charge and the blocked condenser while the building can still tolerate a day without cooling and while parts can be ordered normally. The same tasks run in July are not maintenance, they are a breakdown response with a checklist attached, carried out under pressure, at premium parts pricing, with an unhappy occupant. Exactly the same is true of a heating start-up done in November rather than September. The other section that repays attention far beyond its size is the consumable register. Filter and belt sizes are the most requested detail on any return visit and almost nobody records them, so a straightforward filter change becomes two journeys: one to measure and one to fit. Writing them down once, with part numbers, removes that permanently.
B. What it looks like filled in
The readings table from one rooftop unit across three visits. Every individual number passed, and the table is still telling you to act.
| Reading | Baseline | Last PM | This PM | Trend |
|---|---|---|---|---|
| Supply air temperature | 54 | 54 | 55 | Stable |
| Temperature split | 19 | 18 | 17 | Drifting |
| Superheat | 10 | 12 | 14 | Rising, 3rd visit |
| Compressor amps | 22.4 | 22.9 | 23.6 | Rising, 3rd visit |
| External static pressure | 0.82 | 0.84 | 0.85 | Stable |
| Combustion efficiency | 81 | 81 | 80 | Stable |
Nothing here failed, and two rows together say the unit is losing charge. Superheat rising across three consecutive visits while compressor amps climb and the temperature split narrows is the classic signature of a slow refrigerant loss, and no single reading in that pattern would trigger anything on its own. That is the entire argument for carrying readings forward rather than recording them fresh each time: a pass or fail against tolerance cannot see a direction of travel, and the direction is what gives you the months of warning. What happens next belongs elsewhere, which is worth being clear about. Leak testing and any refrigerant recovered or added is a legal record with cylinder details, and it is logged on the HVAC work order rather than here. This checklist's job is to notice, raise the corrective work order and hand over.
Word to adapt the task lists to your equipment types, Excel for the consumable register with its countdown, the readings carried forward across visits and the PM Log tab holding every unit's history, PDF for the copy that goes up to the roof. One file per unit. Free, and yours to rebrand.
How do you run an HVAC preventive maintenance visit?
Set the unit up once, then work only the sections that are due. The seasonal visits are booked ahead of the season rather than into it. Six steps.
Set the unit up once, including how you reach it
Asset ID, equipment type, make, model, serial, capacity, refrigerant type and nameplate charge, the area served, the year installed, and the location with whatever access equipment is needed. Then criticality and the PM frequency chosen for this unit, with the reason.
Fill the consumable register on the first visit
Every filter, belt and consumable with its size, quantity, part number, last changed date and next due. This is twenty minutes once that saves a return trip on most future visits, and the countdown then runs on its own.
Work only the frequency sections that are due
Six monthly tasks covering filters, condensate, noise, setpoint, alarms and clearance. Ten quarterly covering belts, alignment, lubrication, blower, electrical connections, running amps, capacitors and contactors. Ten annual at the system level.
Run the seasonal start-ups before the season
Ten cooling tasks in the spring: coils, charge verification, leak evidence, fan balance, head pressure, crankcase heater, tower and chilled water. Ten heating tasks in early autumn: heat exchanger, burner, ignition, gas pressure, combustion analysis, flue, safeties and carbon monoxide.
Record the readings against the last visit and the baseline
Twelve values including supply and return temperatures, the split, suction and discharge pressures, superheat, subcooling, compressor and blower amps, static pressure, combustion efficiency and flue temperature. Note the direction, not just the value.
Raise a work order for anything found, then close the visit
Every deficiency with a severity and a corrective work order number, because one without a number will be found again next visit. Then task completion with a reason for anything incomplete, the condition the unit was left in, parts to order, and the date of the next seasonal visit.
Cooling start-up versus heating start-up
Both are called a seasonal start-up and they share almost no tasks. Booking them as if they were interchangeable is how one of them ends up being done in the wrong month.
| Aspect | Cooling start-up | Heating start-up |
|---|---|---|
| When it should run | Spring, before the first warm spell | Early autumn, before the first cold snap |
| What it is checking | The refrigeration circuit and heat rejection | Combustion, the heat exchanger and safety shutdown |
| Signature tasks | Coil cleaning, charge verification, crankcase heater | Combustion analysis, flue integrity, flame sensing |
| The reading that matters | Superheat or subcooling, and the temperature split | Combustion efficiency and flue gas temperature |
| The safety question | Is the circuit sealed and the charge correct | Is anything producing carbon monoxide |
| Cost of doing it late | A hot building and premium-priced parts | A cold building, and a genuine safety exposure |
The asymmetry is worth naming: a late cooling start-up is expensive, and a late heating start-up can be dangerous. If the cooling circuit is short of charge you find out on the first hot day, in the form of complaints, an emergency call-out and parts at whatever price is available that week. Unpleasant and avoidable, but it is a comfort and cost failure. A heating start-up skipped or deferred is a different category, because several of its tasks exist specifically to catch conditions that produce carbon monoxide or an uncontrolled burn: a cracked heat exchanger, a blocked flue, a failed flame sensor, a safety limit that no longer trips. Those do not announce themselves through a comfort complaint. That is why the template keeps them as two distinct visits with two distinct task lists rather than one combined seasonal service, and why the close section asks you to name the date of the next seasonal visit before you leave this one.
When the template starts to feel limiting
One file per unit is the right structure and the wrong scale. It runs out in four ways as soon as you have more than a handful of units.
One file per unit, and dozens of units
The structure that makes a single unit's history readable is the same one that makes the estate unreadable. Answering a question across all units means opening all of them.
Consumable and seasonal due dates sit in files
Filter due dates and the next seasonal visit are both calculated and both invisible until somebody opens that unit's sheet, which is usually after the season has started.
Trends only exist if the last visit is to hand
Carrying readings forward depends on the previous file being available and filled in. A stand-in technician with a blank sheet restarts the baseline without meaning to.
Deficiencies and work orders live apart
The checklist records a corrective work order number; whether that job was ever done is somewhere else entirely, and the link is only tested at the next PM.
What running this in Facilio looks like
The template is the paper version of this visit. The tasks are the same ones; the difference is that readings attach to the unit and build a history without anybody carrying the last sheet up the ladder.
Audit Report Intelligence
Readings become a trend automatically
Because each value sits against the unit, superheat rising across three visits reads as a pattern rather than as three separate numbers in three separate files that nobody puts side by side.
Ops Performance Intelligence
Seasonal and filter due dates raise themselves
Cooling and heating start-ups and every consumable interval carry their own dates per unit, so a start-up gets booked before the season rather than being remembered during it.
Work Completion Validator
Partly done PMs are caught
Task completion below full needs a reason, and holding the closure against evidence is what stops a unit accumulating years of signed paperwork while tasks quietly go unperformed.
Contractor Work Tracker
Certification and refrigerant handling stay with the contractor
Who is qualified to work on the circuit, and what they are certified for, sits against the contractor record, so the question is settled before the visit rather than after it.
Hallucination-free by design. Atom AI answers from the records in your tenant rather than generating plausible text, so an empty field reads as empty rather than filled in for you.
Frequently asked questions
What is an HVAC preventive maintenance checklist?
An HVAC preventive maintenance checklist is the scheduled service record for a single heating or cooling unit, organized by how often each task falls due. This one carries forty-six tasks: six monthly, ten quarterly, ten in the cooling season start-up, ten in the heating season start-up and ten annual.
It also holds the equipment details, a register of filter and belt sizes with part numbers, twelve benchmark readings compared against the previous visit and the baseline, any deficiencies with the corrective work order raised, and the close with the date of the next seasonal visit.
What should be on an HVAC PM checklist?
Monthly: filters, condensate pan and drain, unusual noise or vibration, whether the space is holding setpoint, standing alarms, and clearance around the unit. Quarterly: belts and tension, pulley alignment, lubrication, blower cleaning, electrical connections, running amps against nameplate, capacitor readings and contactors.
Seasonally: a cooling start-up covering coils, charge verification, leak evidence, fan balance, head pressure and crankcase heater, and a heating start-up covering heat exchanger, burner, ignition, gas pressure, combustion analysis, flue and carbon monoxide detection. Annually: ductwork, economizer, static pressure, airflow balance, sensor calibration and interlocks.
How often should HVAC preventive maintenance be done?
Most commercial units need a monthly look, a quarterly service and two seasonal start-ups, with a deeper annual visit covering the system rather than the unit. The template lets you set and justify the frequency per unit rather than applying one interval to an estate.
Criticality is what should drive it. A unit that a process or a clinical area depends on earns a shorter interval than one serving a rarely used space, and recording why the interval was chosen is what stops it drifting later.
Why are cooling and heating start-ups separate visits?
Because they check almost entirely different things and need to happen at opposite ends of the year. The cooling start-up is about the refrigeration circuit and heat rejection; the heating start-up is about combustion, the heat exchanger and safety shutdown.
There is also an asymmetry in what going late costs. A cooling start-up done late means a hot building and expensive parts. A heating start-up done late means running into the season without having checked for a cracked heat exchanger, a blocked flue or a failed safety limit, which is a safety exposure rather than a comfort one.
Why record filter and belt sizes?
Because they are the single most requested detail on a return visit, and almost nobody has them. Without a recorded size a routine filter change becomes two journeys: one to measure and one to fit.
The register takes a few minutes on the first visit and covers every filter, belt and consumable with its size, quantity, part number, last changed date and next due, so the countdown runs on its own and the van is loaded correctly before anybody sets off.
What readings should be recorded on an HVAC PM?
Twelve, and the template asks for each against the last visit and the original baseline rather than on its own: supply and return air temperatures, the temperature split, suction and discharge pressures, superheat, subcooling, compressor and blower motor amps, external static pressure, combustion efficiency and flue gas temperature.
The comparison is the point. A reading inside tolerance that has moved the same direction at three consecutive visits is telling you something a pass or fail never will, and it is usually telling you months in advance.
Where do refrigerant records go?
Not on this checklist. Refrigerant added or recovered is a legal record in most jurisdictions and needs the quantity, the cylinder identification and the technician's certification against it, so it belongs on the HVAC work order for that visit.
This checklist records the nameplate charge as a reference and asks you to verify the charge by superheat or subcooling and note the method. If a leak is suspected it asks for a leak test and the result. Everything that follows, including the handling record, sits with the work order.
How is this different from an HVAC work order?
This is scheduled maintenance on a unit, organized by frequency and repeated on a cycle. An HVAC work order records one job, usually a fault: what was reported, what was found, what was done, the parts used and the refrigerant handled.
In practice they work together. The PM checklist finds something, raises a corrective work order number against it, and that work order carries the diagnosis and the repair. Keeping them separate is what stops a maintenance record turning into a breakdown record.
In one paragraph
An HVAC preventive maintenance checklist is organized by frequency, and the parts that repay the most attention are the two seasonal start-ups. Run the cooling start-up in the spring and the heating start-up in early autumn, because the same tasks carried out during the season are a breakdown response with a checklist attached, and the heating one carries a genuine safety exposure rather than just a comfort one. Fill the consumable register on the first visit, since filter and belt sizes are what turn a return trip into a single visit. Work only the frequency sections that are due and keep the monthly list short enough that it actually gets done. Carry the twelve readings forward against the last visit and the baseline, because a value inside tolerance moving the same direction three visits running is the warning no pass or fail will give you. Raise a corrective work order for everything found, and log any refrigerant handling on the HVAC work order where it legally belongs.
The template is the floor, not the ceiling
Take the checklist; it will run a proper visit and leave a record worth reading next season. When one file per unit stops scaling across an estate, a connected CMMS holds it differently: readings attached to the unit so the trend builds itself, seasonal and consumable dates that raise their own work, deficiencies linked to the jobs that resolve them, and a technician arriving with the right filter sizes already on the van.
