Troubleshooting Central Air Conditioners
Central air conditions will need some professional maintenance, but there are many minor problems that you can easily fix yourself. If your central a/c unit isn't working properly, look for the problem you're experiencing on this chart and see if it's a do-it-yourself job.
|1. No power.
||1. Check for blown fuses or tripped|
circuit breakers at main entrance
panel or at separate entrance
panel; restore circuit.
|2. Thermostat set
|2. Lower thermostat setting 5°.|
|3. Motor faulty.||3. Call a professional.|
|4. Call a professional.|
system out of
|1. Balance system.|
|1. Thermostat set
|1. Lower thermostat setting 5°.|
|2. Evaporator dirty.||2. Clean evaporator|
|3. Unit too small.
||3. Replace with larger unit;|
call a professional.
||1. Thermostat set
||1. Lower thermostat setting 5°.|
|2. Condenser dirty.||2. Clean condenser coil and fins;|
| if necessary, straighten fins. |
|3. Condenser unit||3. Remove debris blocking condenser; |
|| cut down weeds, grass, and vines. |
|4. Evaporator dirty.|| 4. Clean evaporator.|
|5. Compressor faulty.||5. Call a professional.|
|6. Not enough
refrigerant in system.
|6. Call a professional.|
turns on and
|1. Condenser dirty.
2. Condenser unit
|1. Clean condenser coil and fins.|
2. Remove debris blocking condenser;
cut down weeds, grass, and vines.
|3. Evaporator dirty.||3. Clean evaporator.|
A dirty evaporator is a common problem. On the next page you'll learn how to access the evaporator and clean it properly.