WHAT IS AN AIR CONDITIONER TUNE UP?
You decide to get a spring tune up for your AC system. Good idea. You lessen your chances of being hot as #*&# and waiting for the AC technician to show up. A well-tuned AC runs more efficiently which can save you money.
The ads can be confusing. Items listed and prices vary two-fold. Is there really a difference between a 15-or-29-point tune up list? No, there is not a difference, because it is the content of the lists, and not the lenght that is important. Most 15-point lists can cover the important components of your system. The list should include inspection, adjustment and cleaning (if needed) of the thermostat; electrical, mechanical, refrigerant and drainage systems. Frankly, listing a longer list is often a marketing tool used by many HVAC companies. The longer list gives the impression that more work gets done.
Doc J lists 19 items and includes 10 essential tasks. Make sure that your check-up list includes these 10 tasks, and you will likely get a good AC check-up.
Essential Tasks for an A/C Tune Up
- Check for proper refrigerant pressures and levels.
- Inspect all electrical components (capacitor, contactor, and relays) for adequate charge, capacity, and contact.
- Check the patency of the condensate drain to make sure it is clear.
- Inspect evaporator coil for leaks and corrosions. Depending on the type and position of the evaporator coil, inspection the coil can be difficult. Caked/clogged evaporator coils need special cleaning.
- Check mechanical components (motors and compressor). Oil motors as needed.
- Calibrate thermostats.
- Inspect the condenser fan for cracks, chips, and imbalances. Rebalance if needed.
- Clean the exterior of the A/C.
- Clean, or replace standard filters.
- Check the integrity of the duct system.
ALERT! Outside condenser coil cleaning is an essential part of an air conditioner tune up. Insist on having the technician clean the coil. A dirty caked condenser coil has difficulty releasing the heat from the refrigerant. This causes your AC to work harder to keep you cool. More work means more wear and tear on parts and shortens the HVAC lifespan.
Checking refrigerant lines and levels is a routine part of a tune-up. The AC system works best with a tight (no leaks) system. A leak in the system (low pressure) signals a problem. The problem could be loose tubing or leaking valves . Simple tightening of fittings and replacing valves could end the leak.
Holes in the coils is a more serious problem. Older coils (10 yrs.) can rust and develop holes. If the holes are extremely small, adding a sealant can seal the holes. However in most cases, holes in a coil mean that the coil needs replacing. It is a common misperception that all older systems will have leaks requiring “top-off” amounts of refrigerant. Your system should not need yearly refrigerant. Be wary of paying for yearly refrigerant.
Got questions? Call Doc J