Just messing with Roy
There are some common reasons for ice to form on the A-coil, suction line and the compressor and basically boils down to pressure temp relationship. Any time the pressure drops within the A-coil to the 32 degree temp usually around 55 PSI for R-22 ice starts to form due to the condensate present on the coil. When the ice blocks all air flow across the coil the ice just gets thicker and thicker.
The common reasons for ice on the coil is
- Dirty stopped return air filters or no filters in place and the coil becomes lint coated.
- Low refrigerant in the system due to a leak.
- Improper indoor fan motor RPM
- As in the case where I took the pics the thermostat was set at a temp that was not attainable. The unit ran 24/7 non stop when the outdoor temp was in the low forty’s thus lowering the refrigerant pressure/temp in the system and formed the ice. The system was a new install and the refrigerant charge might have been on the short side when they fired the unit off the first time.
Anywho I turned it over to the contractor that installed it its his problem not mine:D:D:D:D