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Old 05-19-2009, 09:58 AM   #1
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Air Handler Problem


I just bought a new house and the AC system is confusing me.

The Air Handler does not like to turn on without coaxing. And when it does come on it only stays on for a few minutes. The outside unit however, that will run all day but that doesn't do me much good when the air handler doesn't blow air throughout my house.

Any HVAC people have an idea before I get someone to come out and look at it?

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Old 05-19-2009, 04:44 PM   #2
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Air Handler Problem


sounds like a bad fan capacitor

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Old 05-19-2009, 06:38 PM   #3
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Air Handler Problem


What do you mean by coaxing, please explain in detail??
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Old 05-19-2009, 06:44 PM   #4
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Air Handler Problem


I think he means the blower drags before running to speed
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Old 05-20-2009, 08:04 AM   #5
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Air Handler Problem


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Originally Posted by leoacrh View Post
I think he means the blower drags before running to speed

With all due respect waiting on the OP answer.
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Old 05-20-2009, 09:26 AM   #6
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Air Handler Problem


By coaxing, I mean that if I leave it in Auto and the outside unit is running, but the inside unit is not then I kind of move the switch back and forth between auto and on. Sometimes it kicks on in the On position, other times it has to be between those two.

Regardless of where I have it, it only stays on for up to ten minutes while the outside unit will run all day.

The thermostat is really old. I'd say original with the house(1983). The outside unit is from 96 I believe, but the Air handler im told is older and not the match of the outside unit(different manufacturer maybe).
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Old 05-20-2009, 12:35 PM   #7
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Air Handler Problem


Is it a round Honeywell?

If so, probably the sub base needs replaced.
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Old 05-20-2009, 01:30 PM   #8
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Air Handler Problem


The thermostat looks like this one



But with only one mercury glass bulb, and this one I don't see the Fan Auto/on switch or the em. heat/heat/off/cool switch on the bottom.
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Old 05-20-2009, 01:47 PM   #9
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Air Handler Problem


Probably a bad sub base.
They wear out.

Obviously can't say 100%. but good chance its the sub base.
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Old 05-20-2009, 01:53 PM   #10
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Air Handler Problem


Since both the outside unit and air handler will work, and at the same time you think switching out the thermostat could solve my problem?
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Old 05-20-2009, 01:56 PM   #11
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Air Handler Problem


It would help to know what brand and model indoor unit you have.

But, yes. The sub base can have a problem on the fan side and not the part that controls the outdoor unit.
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Old 05-20-2009, 02:14 PM   #12
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Air Handler Problem


Quote:
Originally Posted by Myrkur View Post
By coaxing, I mean that if I leave it in Auto and the outside unit is running, but the inside unit is not then I kind of move the switch back and forth between auto and on. Sometimes it kicks on in the On position, other times it has to be between those two.

Regardless of where I have it, it only stays on for up to ten minutes while the outside unit will run all day.

The thermostat is really old. I'd say original with the house(1983). The outside unit is from 96 I believe, but the Air handler im told is older and not the match of the outside unit(different manufacturer maybe).


If the thermostat is as old as you say and the indoor fan comes on as stated I would definitely replace the thermostat with a new digital stat.

No more mercury bulbs to worry about.

You will love the new one anyway it tells the exact temperature.
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Old 05-20-2009, 03:59 PM   #13
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Air Handler Problem


Called the Home Warranty place and they had a Tech come out(was at my house within 30 minutes of calling the home warranty place, 5 minutes from when the company called to tell me he was comming out).


He replaced the relay on the air handler, said it was corroded and there were a couple burnt wires. It was working when he left so should be good now. =D
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Old 05-21-2009, 01:06 PM   #14
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Quote:
Originally Posted by Myrkur View Post
Called the Home Warranty place and they had a Tech come out(was at my house within 30 minutes of calling the home warranty place, 5 minutes from when the company called to tell me he was comming out).


He replaced the relay on the air handler, said it was corroded and there were a couple burnt wires. It was working when he left so should be good now. =D
Glad he fixed it and your cool, thanks for the return reply.

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