HVAC Maintenance Checklist for Commercial Buildings


It’s essential to make sure that you have a reliable HVAC system for your commercial property. Especially during the winter months, you should definitely look into the  HVAC maintenance. If you properly maintain the equipment then you can reduce the overall maintenance costs, improve the scheduling of preventative maintenance activities, etc.

To preserve indoor air quality and preserve energy efficiency, your HVAC system must be up to date. Inspect the system at least once a year.  In this article, we provide you with specific maintenance checklists to make your job easier.

Replace air filters 

The first step to HVAC preventative maintenance is changing its filter. This can be done by yourself to clean your HVAC before summer. Depending on the unit, the filter can either be replaceable or washable.

Air filter collects the impurities in the air and gets clogged if not maintained regularly. Dust, debris, indoor air pollutants are the major reasons for clogs.  Most HVAC systems need either air filter cleaning or replacement every one to three months.

It’s good to check the HVAC systems at least once a month and replace them when they’re clogged. To maintain the indoor air quality, clean air filters also help maintain HVAC system efficiency.

Clear drain lines and pans 

Check the drain lines and make sure they’re not clogged. The moisture absorbed by your HVAC will be taken away through drain lines and collected in condensate pans. If the normal cleaning method doesn’t work out then call for AC repair.

Regularly empty the condensate pans.

Check electrical connections 

Always keep an eye on electrical connections that lead to your HVAC system, especially the connections that pass to the outdoor unit. Outdoor conditions can cause faster deterioration of the equipment, so the wires at such places may require frequent  inspection.

Check the level of refrigerant

Low refrigerant levels in the AC can lead to a problem of not cooling enough. If there’s a refrigerant leak in your AC, it may not blow out cool air at all. As part of your HVAC maintenance, hire an expert to check the unit’s refrigerant level. Sometimes the system may need a recharge or there may be a leak that needs repairs.

Check fan motor operation 

Commercial HVAC systems have noisier units than residential counterparts, but you should know the  “good” and “bad” HVAC sounds. If you hear an unusual noise then there might be problems in moving parts such as the fan motor which needs to be adjusted or lubricated. 

Test the thermostats 

Test the thermostats by manually adjusting the temperature by a few degrees, after some time set back again if you notice any changes. If the thermostat doesn’t respond, follow the troubleshooting steps. Sometimes you must perform a factory reset and replace the batteries.

Clean and adjust fan and blower

The fan or blower in an HVAC system is the major part that moves the conditioned air into a space. The build up of dirt and debris on these parts can decrease air flow. This not only reduces HVAC efficiency but can also cause the AC to freeze up.