Central Air Condioner Help

11 years ago

last modified: 11 years ago

Hi,

5 years ago (5-8-2010) we had a new heat and air system installed in our home. Heil is the brand and it's a heatpump.

Until late last week it has done a great job both in the Winter AND Summer BUT late week the coil in the air handler froze up, I turned the system off and checked and found that I had forgotten to clean the washable filter for apparently far too long. I then cleaned the filter and after a couple of hours of being turned off I turned the system back on. Everything seemed to be fine, that is until today. Here' in KY we had a high of 90 degrees the thermostat was as always set at 70 degrees BUT by mid day the temp in the house was up to 73 degrees, and that's where is has remained to this time (6:30 PM central time) and the outside temp is now 84 degrees.

By the way, the air still seems to be rather cool coming out of the registers.

Ideas on what is the most likely problem?

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Comments (5)

Maynard Krebs
Original Author
11 years ago
last modified: 11 years ago
Temp of air coming out of registers is 58-60 degrees

small copper line at air handler is barely warm and the larger insulated
copper line is just a little cool, NOT cold and NOT sweating.

outside unit is running and not making any sort of strange sounds.
tigerdunes
11 years ago
Refrigerant charge should be checked by your dealer. Also check for leak if freon is low...

IMO
Maynard Krebs thanked tigerdunes
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Maynard Krebs
Original Author
11 years ago
anything else I should be aware of that the tech needs to check ?
tigerdunes
11 years ago
I am always interested in Delta T, difference between supply temp and return temp. Should be above 15 degrees minimum. Of course there are factors like leaks in ductwork. thermostat setting, outside temp. location of ductwork, insulation properties of ductwork, etc.

When I see threads like this, I always wonder if system is sized correctly for average temps not extreme temps like the South is experiencing this week.

Have you scheduled a service call yet? Better get in line if you are uncomfortable.

IMO
Maynard Krebs
Original Author
11 years ago
Thanks it's keeping up pretty well today, set on 70 degrees as usual and it was able to satisfy the thermostat until 1:30 or so this afternoon BUT even at that the temp inside the house has only gotten up to 71 degrees and NO higher. The system has been running since 1:30 and it's now 3:42 central. In the previous 4 plus years of being installed this system has seen 96-100 degrees and still until not has NEVER failed to "keep up" with the "set" temp on the thermostat so I have to figure something has "changed" and that the system was/is sized correctly and so forth. BUT I'm only looking at this from a "common sense" point of view.

No, I have not scheduled a service call yet but I will before the hottest of the Summer gets here, that's for sure.