Gas and Oil Home Heating Furnaces - frozen pipes-Where is coil?

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07-26-01, 06:18 PM
I have the same problem as several posts. Pipes from the blower unit outside are freezing into the house.The replies are to clean the coil WHERE IS THE COIL?
Also, replies have said to check the filter. IS THIS THE 20X30X1 FILTER THAT THE REPLIES ARE REFERING TO?
Could the freezing be due to a really humid day?
If other advice, please be detailed. Thanks a bunch!

Ichabod
07-26-01, 08:27 PM
The coil is the evaporator coil, and it is located just in front of the indoor blower, in what is commonly called the air handling unit. There may be some screws holding an access panel that can be removed. On my unit the panel gives access to the back side of the coil and the drip pan. To get to the front side I have to stand on a ladder and go up through the return air plenum. I brush mine off and blow compressed air thru it. You can also find some cleaning sprays. While you're in there use your wet/dry vac and clean out the drip pan. The filter is the dirty fiberglass mat that you described. Your coil possibly looks like that filter.