How to Keep HVACR Equipment in Top Working Condition


Preventative maintenance is an essential routine that needs to be done to keep your HVACR equipment working properly.

For a refrigeration system to be properly maintained, all the main components should be scheduled for maintenance and checked comprehensively by an HVAC expert. The contractor will be able to check the components of the system, including condensers, compressor units, and evaporators.

Ideally, condensers should have a maintenance schedule every six months, but if there is clogging or something is wrong with the air passages through the finned surface, a contractor must be called immediately to avoid long term problems.

Condenser Maintenance
1. The condenser coil should be cleaned and washed – It should be cleaned regularly with a vacuum cleaner, brush, commercially manufactured coil cleaning foam, and pressurized water.
2. Make sure that the foam cleaner is not acid-based.
3. The condenser fans should be inspected – Make sure that each fan freely rotates and tighten all loose fan set screws. Replace the blades if there is any sign of damage.
4. Be sure to lubricate the motors

Compressor Unit Maintenance
1. Tighten all electrical connections
2. Check for broken wiring insulation and rusted terminals.
3. Replace damaged wiring if needed.
4. Inspect all electrical components – Components should be inspected properly for worn and pitted contact points and cleaned if necessary.
The discoloration in the conductors may indicate a serious overcurrent condition or a loose wire.
5. Remove any strange material found in the contractor.
6. Inspect all relays for broken points and replace if necessary.
7. Be sure to inspect the electrical connections in the compressor electrical box.
8. Check the operation of the control system – Inspect all pressure and safety controls. Be sure to see that the oil safety and high-pressure controls are working correctly.
9. Inspect the operation of the room temperature thermostat to assure that the liquid line solenoid valve closes completely and the compressor pumps down and cycles off.
10. The oil level in the compressor should be at or between one-third and two-thirds of the sight glass.
11. Inspect the condition of the refrigerant line insulation.
12. Change or replace all missing valve caps and unit covers.

Evaporator Maintenance
1. For proper defrosting, check the evaporators every month. Ice on the evaporator coil can cause inefficiencies in the operation of the system and can also be dangerous for the coil surface.
2. Tighten all electrical connections in the electrical panel – Inspect the system for damaged wiring insulation and make sure that all spade connections are tight.
3. Check fan motors and blades – Clean the surface of every fan blade and apply the appropriate lubricant on motors with lubrication fillings.
4. Inspect all defrost heaters – Check if the heaters are in the correct position for the best heat transfer to the evaporator coil.

All mechanical equipment requires routine service and maintenance. Contact your HVAC/R expert to keep your equipment working correctly.