Original message
| monty101
 |  "my coil needs cleaning"
, posted Mon 14 Jan 18:35  
how is the easiest way to clean coil. Mine is so dirty the air won't hardly blow through it. It sets on top the furnace and is enclosed and has a plenum above it that has ducts attached. I thought maybe cut a hole in the top and pour some cleaner down on the coil. Hows the best way to do it??
monty
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Replies:
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| 341
| "Re(1):my coil needs cleaning" , posted Mon 14 Jan 18:44
You have to get inside the coil. If you have enough room to cut the tin below the coil, you can reach up inside the coil and brush the dirt and dust off and suck it up with a vacuum.
Or cut the tin around the opposite end of where the lineset connects, there will be an end plate you can unscrew and access the underside of the coil there.
What type of furnace do you have? Is it high efficiency? There could be a secondary heat exchanger plugged as well. Check the blower wheel too.
www.hvactechgroup.com
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| | monty101
| "Re(2):my coil needs cleaning" , posted Mon 14 Jan 22:31
it was installed in 1988 and the coil has not been touched. It leaks a little water out and I have to put a towel against it in the summer or it will create a problem. Its not much but it indicates the tray on the coil is probably filthy or may even been rusted out. It still drains most the water out I guess because the pump runs ever so often in the summer to pump it out. I don't think its high efficiency. I'm thinking since the copper line connect in the front and the opposite side sets against the wall of the closet its in that I probably will have to try to cut it loose all the way around from the top of the furnace and see if I can raise it some way to get under it. I guess I may have to pull the plenum off in the attic. Does any body know if I will probably have to pull the plenum off in the attic to raise the coil up to clean it???
monty
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| "Re(3):my coil needs cleaning" , posted Tue 15 Jan 19:32
Yeah, yours is the worst case situation. If there is enough line set I would try to just slide the coil out...carefully. It wouldn't be worth your money to recover the refrigerant and cut the lines to remove it. I would replace a 20 year old A/C before I spent any serious money on it.
www.hvactechgroup.com
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| | 341
| "Re(4):my coil needs cleaning" , posted Tue 15 Jan 19:34
You might be able to just cut access at the front of the coil, where the lines connect. There would be a delta plate you can remove as well, to access the inside (underside) of the coil. It's just hard sometimes to remove it from the front with all the copper in the way.
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| | monty101
| "Re(5):my coil needs cleaning" , posted Tue 15 Jan 22:03
where is this delta plate? I guess from what you guys are saying I need to investigate the possiblity of removing the cover around where the copper tubing connects. Then try to either take off this delta plate or pull the coil out enough to get up under it some way and clean it. I guess if it doesn't work out I can slide it back in and then patch the hole by using duck tape to seal the cover back in place. Thks
monty
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