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Heat Pumps

10 Most Common Problems

Diagnosis &
Repair Cost

(U.S. dollars w/o tax)
1. Outdoor unit does not come on
 a. No AC power to unit 
 
- Defective breaker
$95 - 144
 
- Wire burned at disconnect
$68 - 90
 
- Transfer to electrician
$43 - 58
 b. Defective contactor$114 - 271
 c. Defective thermostat$152 - 203
 d. Defective transformer$99 - 132
 e. Dog chewed through low voltage wire$68 - 90
 f. Wire burned off contactor$68 - 90

2. Circuit breaker trips when unit comes on
 
 a. Weak breaker$95 - 144
 b. Grounded compressor$700 - 1100
 c. Condenser fan motor shorted to ground$248 - 337
 d. Defective capacitor$123 - 164

3. Outside unit hums but fan does not run
 
 a. Defective fan motor$248 - 337
 b. Burned wire at contactor$68 - 90
 c. Defective capacitor$123 - 164

4. Outside fan runs but compressor does not
 
 a. Burned wire at compressor$68 - 90
 b. Compressor out on internal overload 
 
- Adjust refrigerant charge
$48 + 24 per lb.
 
- Clean condenser coil
$103 - 140
 
- Defective run capacitor
$123 - 164
 
- Internal compressor failure
$700 - 1100
 d. Defective start capacitor$132 - 176
 e. Add hard start relay$157 - 209
 f. Defective high pressure switch$180 - 240

5. Heat pump freezes up w/ice
 
 a. Normal operation during cold weather$43 - 58
 b. Low on refrigerant$48 + 24 per lb.
 c. Defective defrost timer$196 - 262
 d. Defective blower motor$275 - 385
 e. Dirty filter$68 - 90
 f. Dirty evaporator coil$103 - 140

6. Cool air blowing from vents during winter
 
 a. Defective reversing valve$461 - 656
 b. Low on refrigerant$48 + 24 per lb.
 c. Heat pump not running 
 
- See #1
 

7. Emergency heat does not work
 
 a. Heat strips burned out$126 - 270
 b. Defective limits$104 - 138
 c. Defective thermostat$152 - 203
 d. No AC power to the air-handler$43 - 58
 e. Wire burned off at the air-handler$68 - 90

8. Outdoor unit runs constantly
 
 a. Low on refrigerant$48 + 24 per lb.
 b. Returns pulling attic airTime & Material
 c. Defective thermostat$152 - 203

9. Indoor fan does not come on,
 
outdoor unit running
 a. Defective blower motor$275 -385
 b. Defective capacitor$88 - 118
 c. Evaporator extremely dirty$103 -140
 d. Filter dirty$50 - 66

10. Air temperature fluctuates from room to room
 
 a. No dampers installed in systemTime & Material
 b. Dampers not adjusted for proper air balanceTime & Material
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