low air flow
im working on a comfortmaker 80% furnace, 3 ton of air, my coil keeps freezing, my static pressure is .47, can you help? thanks
You need to call for a service Tech!
Originally Posted by mike dixon
The question is; how was the .47-ESP (External Static Pressure), arrived at?
The blower wheel blades could be filled with lint resulting in the 0.47 ESP, & thus the low airflow, also could have a partially plugged evaporator coil.
If airflow is real low, then that is too high an ESP.
Tech will need to check the blower wheel blades & the evaporator coil & the blower motor & run cap.
A freezing coil is a serious situation & could cause liquid slugging damage to the compressor! - Darrell
Last edited by udarrell; 08-14-2009 at 10:26 AM.
Reason: Serious costly damage to compressor - possible
If your Comfortmaker is 14 years old like mine was last Sept., your indoor coil is leaking and shot so you are low on refrigerant. Thats my guess.
The first thing a tech might do is take a look at the indoor coil, the end where the copper tubing makes a 180 might have a shiny, oily residue on them mixed with condensation. This is the oil thats leaks out along with refrigerant. Touch it, rub it between your fingers. If oily, call a tech and break open your wallet.
Last edited by udarrell; 08-14-2009 at 11:39 AM.
Reason: Further Clarification...
His post brought back "fond" and "expensive" memories.....