AC icing up

[Hookster57]

When I leave my AC on At 74 the compressor ices up. Any ideas?

 

[Daman858]

My son, an HVAC tech, says low on freon.

 

[Hookster57]

It was just rebuilt and tested.....no leak, full freon

 

[seasick]

Icing can be caused by low refrigerant, blocked airflow, problem with cooling water or just setting the thermostat too low for the current conditions. Icing can lead to compressor damage so you need to find out what is going on.

 

[izzy]

I agree with the low freon or dirty air filter and system starving for air.

 

[Tucker]

Is the raw water pump working? Clogged strainer? Bad charge job?

 

[Grog]

A clogged water pump will cause a high head pressure situation, you'll loose efficiency and capacity (if it doesn't trip first). The icing is from low airflow or a low charge. Are the evaporator coils clean? If you don't run a filter all the junk in the air will settle on the coils and clog the airflow.

 

[RAINMAKER]

Low "return" air flow I would bet. If anything is to close to the return/intake side of my a/c it'll look like an ice maker fairly quick......