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Old 10-18-2009, 09:34 PM   #1
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2 units both freezing Just turned Heat On


2 and 4 ton w/heat pumps.
It's 44 degrees right now. Normal heat will run for 10 minutes.... Then kick to AUX. Surely this cannot be normal. I have someone coming next day or two....Does this look like an easy fix? If not what is a ball park figure of what I will have to fork out... i know it's a stupid question... just want to be prepared.


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Old 10-19-2009, 05:46 PM   #2
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2 units both freezing Just turned Heat On


Are you sure its not just normal frost build up.
The one on the left looks normal. The one on the left a little heavy.

The aux heat comes on when they go into defrost.

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Old 10-19-2009, 07:14 PM   #3
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2 units both freezing Just turned Heat On


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Are you sure its not just normal frost build up.
The one on the left looks normal. The one on the left a little heavy.



The aux heat comes on when they go into defrost.
Did not do this last year.....

last night turned heat off low was 39 this morning turned on 67 hold. Whole unit froze in 10 mins... then AUX again.

i left upstairs on 68 hold all night, it was ok in AM.
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Old 10-19-2009, 07:16 PM   #4
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2 units both freezing Just turned Heat On


You might be low on charge.

Not a DIY thing, unless you have cert for refrigerant handling.
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Old 10-19-2009, 07:18 PM   #5
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2 units both freezing Just turned Heat On


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You might be low on charge.

Not a DIY thing, unless you have cert for refrigerant handling.
thanks

will see what they say tommorrow. Will update
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Old 10-20-2009, 07:18 PM   #6
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2 units both freezing Just turned Heat On


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thanks

will see what they say tommorrow. Will update
He said freon was good 56 PSI.

Also that my units were set at 90 min for defrost checking.. he set them to 30 min.

He suggested replacing thermostats.... says anytime you turn heat on and it's 2 degree more then what actual temp is it should go to aux... mine does not go to aux for a good 20 minutes.
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Old 10-20-2009, 08:21 PM   #7
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2 units both freezing Just turned Heat On


56 PSIG, might be good, might not be.
There are other readings that are needed to tell.

What brand and model thermostats do you have.

SAetting defrost from 90 minutes to 30 minutes. Raises your heating bill.
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Old 10-20-2009, 08:26 PM   #8
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2 units both freezing Just turned Heat On


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Originally Posted by beenthere View Post
56 PSIG, might be good, might not be.
There are other readings that are needed to tell.

What brand and model thermostats do you have.

SAetting defrost from 90 minutes to 30 minutes. Raises your heating bill.
power bill --- how much difference?

White-rodgers f82-51 Band/model
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Old 10-21-2009, 04:42 AM   #9
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2 units both freezing Just turned Heat On


The defrost timer. When set to 90 minutes. Meant that the compressor had to of accumilated 90 minutes of run time. With the coil at a temp below 28F.
Before it went into defrost.
Now it only needs 30 minutes.

So on a cold day, at 90 minutes, it could only go into defrost 16 times in 24 hours.
Now at 30 minutes, it can go into defrost 48 times in 24 hours.

Since aux heat comes on during defrost. Your bill generally goes up. How much will depend on how cold the month is.
Could be only 10 bucks, could be 30 bucks on a real cold month.
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Old 10-21-2009, 05:46 AM   #10
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2 units both freezing Just turned Heat On


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Originally Posted by beenthere View Post
The defrost timer. When set to 90 minutes. Meant that the compressor had to of accumilated 90 minutes of run time. With the coil at a temp below 28F.
Before it went into defrost.
Now it only needs 30 minutes.

So on a cold day, at 90 minutes, it could only go into defrost 16 times in 24 hours.
Now at 30 minutes, it can go into defrost 48 times in 24 hours.

Since aux heat comes on during defrost. Your bill generally goes up. How much will depend on how cold the month is.
Could be only 10 bucks, could be 30 bucks on a real cold month.

Makes sense! Should I call a second person out here? Or just leave it alone
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Old 10-21-2009, 05:54 AM   #11
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2 units both freezing Just turned Heat On


You have a 50/50 chance of getting someone that knows how to check charge properly. If you just pick a company from the phone book.

If they advertise that they are NATE certified. You have a better chance that they know what they are doing. No guarranty, but yoour chances are improved with a NATE certified company.

So a second opinion, is a good idea. If you can find the right company.
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Old 10-21-2009, 06:08 AM   #12
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2 units both freezing Just turned Heat On


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Originally Posted by beenthere View Post
You have a 50/50 chance of getting someone that knows how to check charge properly. If you just pick a company from the phone book.

If they advertise that they are NATE certified. You have a better chance that they know what they are doing. No guarranty, but yoour chances are improved with a NATE certified company.

So a second opinion, is a good idea. If you can find the right company.
Thanks

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