Common Metering Devise Problems |
Problems |
Symptoms |
| Stuck expansion valve |
Caused by dirt in the system or moisture |
| Oversized expansion devise |
Causing hunting, liquid flood back to comp |
| Improper sensing bulb location |
Cause liquid flooding at comp. |
| Valve superheat setting too high |
Cause comp overheating |
| Valve superheat setting to low |
Cause liquid flooding in comp |
| Wrong type of valve |
Flooding, evaporator starving, overheating of comp |
| Plugged distributor |
Starving, uneven refrigerant distribution |
| Plugged EQ line |
Cause starving of Evaporator |
| Improperly sized distributor nozzle |
Uneven refrigerant distribution, flooding |
