Anybody try cleaning coil with water hose while unit is in house?


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Old 09-04-14, 08:51 AM
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Anybody try cleaning coil with water hose while unit is in house?

I'm desperate lol. My a/c unit is a pretty crappy design and everybody wants 400 or more to clean the coils. I cut an access panel in the side and there is no way I can get to the underside of the acoil. I'm just wondering if i can put a bucket under coil and hose out the debri. This unit has not been cleaned in 5 years. I don't see any wires in the way.
 
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Old 09-04-14, 09:12 AM
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It is not easy to catch all the water with a bucket, but if you think you can do it, go ahead. ( do not use strong water stream which may damage the fins. )
 
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Old 09-04-14, 10:31 AM
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I will try this weekend if i feel better. Had hernia surgery a few weeks ago and now a/c cannot keep up with the heat. Attic might be well vented, I just dont know much about it. There are at least 12 soffit vents and 7 whirlybirds and one solar fan. Wife used to keep ac on 72 and that was easy last summer. this summer I have to keep a/c on 75 or it won't turn off. A/C has proper amount of freon and had a tuneup. Coils were not cleaned since guy wanted 400.00.
 
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Old 09-04-14, 11:46 AM
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If you can't keep the house cool or AC won't stop because it never reach the set temp, then the first thing to check is the Delta T (return air temperature minus supply air temperature at the registers). it should be at least 15, preferrable 17 or 18. Second, check air flow at the supply register to see if the cold air is strong. Most home owners don't have the tool to measure the air flow, but you should feel the cold air from at least 8-10 feet away. Also, both inside and outside coils need to be cleaned, not just inside coil.
 
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Old 09-04-14, 12:11 PM
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Outside was cleaned very well yesterday. I soaked the heck out of the front and back of coil with coil cleaner. Coolant line going into house is ice cold. Suction from a/c seems fine. If close bedroom door that is close to a/c i can feel it sucking air from the bedroom under the door. Feels like a fan is on the other side of door lol. The analog thermometer I have is stating air is coming out of vents at 60. I recently fogged all windows and doors and sealed any leaks, it seemed to get worse after i sealed the back door that was leaking everywhere. I also sucked a ton of what looked like sewage out of the drain line for the a/c.
 
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Old 09-04-14, 07:27 PM
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Your supply air is at 60, what is the temp of the return air ? And what do you mean ----- 'get worse after you sealed the back door' ?
 
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Old 09-05-14, 05:30 AM
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I mean.

Sorry I was having to type fast cause i'm at work lol. I meant that the air coming out of the vents is showing 60F. After i fixed the leaks in all 3 doors to the house the a/c seems to run longer at 72. Yesterday me and my wife noticed that it is comfortable with a/c at 75 instead of 72. She is wondering if having the doors sealed changed the humidity level causing it to feel better at higher temp?
 
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Old 09-05-14, 07:36 AM
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While the supply air is at 60F, if your return air (or room temp) at that time is 72, then 12 DeltaT is too small. if it was at 75, then 15 is acceptable, but like to see higher. Humidity does affect DeltaT, you will need a humidity meter to find it out.
 
 

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