frosted A-coil - http://www.hvacmechanic.com/ Forums

Original message

Markk

65.29.26.249

"frosted A-coil" , posted Tue 22 Jul 19:05:

What would cause frost on the lower coils and the low-pressure line, yet the top coils in the A-coil are warm to the touch?
Evap coils cleaned, blower running, condenser coils cleaned. Want to know what to consider before the tech gets here.

Sparky

[this message was edited by Markk on Tue 22 Jul 19:32]

Replies:

HVAC-TECH

75.177.87.111

"Re(1):frosted A-coil" , posted Tue 22 Jul 23:14

Sounds like the metering device could be starving the evaporator. I don't know the head pressures. Has the unit been recently serviced? Was it working ok before this? It could be a lot of things and a low charge as TnNATE1412 said.

Does it have a TXV metering device? What is the subcooling?

TnNATE1412

24.158.140.10

"Re(1):frosted A-coil" , posted Tue 22 Jul 19:39

Possibly low charge for a first guess.

Markk

65.29.26.249

"Re(2):frosted A-coil" , posted Wed 23 Jul 12:25

Thanks,
Just wanted to know a direction to go in before the tech can get here.

Sparky