The coils on my coleman furnace, freeze up after a hour use. I have already cleaned my coils?

Question

Someone has told me the problem could be that the coils are stopped up on the inside. Someone else said I could need freon. I have had the unit for five years, and freon has never been added. I was wondering if anyone has any experience with this. and could give me some advice. Thanks

Answer 1

If you clean coils and changed filter then low charge could be the cause. and if thata the case you have developed a leak. make sure a leak test is done prior to charging. a system well maintained should never need to charged for the life of the unit 15-20 yrs

Answer 2

I think that your problem is that your system is low on freon (none added in five years?). Can you check the discharge line from the compressor (outside) while it is running to see if it is not very hot? Have a reputable repair person come out to check your system for proper freon charge.

Answer 3

If you have cleaned the coils I assume you have changed or cleaned the filter also.

If you have, then chances are you are low on refrigerant.

Answer 4

the proper way to clean evap coil is to pull them out and clean if you just brushed off the fin it wasnt a good cleaning call a tech

Answer 5

I would make sure all your vents are open and that your cold air returns are not blocked, as well as making sure your air filter is clean. Most times a freeze up is caused by poor airflow .