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Trane 5 ton heat pump older model.
Started off that in heat when unit came on in heat after a minute went into by pass. Loud noise, High Pitched.
First the reversing valve was changed. Then expansion valve was changed. Still doing same thing. Only does this on heat. After a few minutes compressor quits but fan on top and air handler still running. A/c guys can't figure it out.
Regular Member
Indoor coil CLEAN, filter clean, airflow changed any?Originally Posted by D Pritchard
Trane 5 ton heat pump older model.
Started off that in heat when unit came on in heat after a minute went into by pass. Loud noise, High Pitched.
First the reversing valve was changed. Then expansion valve was changed. Still doing same thing. Only does this on heat. After a few minutes compressor quits but fan on top and air handler still running. A/c guys can't figure it out.
New Guest
Yes, Yes, and no. air handler is fine.
Professional Member*
I second Chris W's comments. Just how cold is it outside when this happens ?
From your description the "A/C Guy" is a replaceman rather than a repairman.
I suggest checking the Contractor Locator Map for Professionals in your area. If there are none close I would then look for a Service Contractor that does both Residential and Commercial (with emphasis on Commercial and specifically heat pumps). You need a quailfied professional not a "Parts Changer".
If sense were so common everyone would have it !You cannot protect the Stupid from themselves !"Experience is the ability to recognize a mistake Before you make it again!" (Stolen Quote)
Professional Member*
Maybe you need to get some heat pump guys then.
Make sure the indoor coil is a match and has a HP TXV.
Ask them how much airflow you have across the indoor coil. You need to be close to 400 Cubic Feet per Minute (CFM) per ton.
If you have 200 CFM per ton for example, you will certainly have the problems you are describing.
Professional Member*
And yes, get a real pro that can actually diagnose what exactly is wrong and replace just the correct part.
New Guest
Thanks!
Professional Member*
who's throwing parts at it and not diagnosing the problem?
tell them to STOP!
Professional Member*
^^^Wise words.^^^
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