Carrier heat pump trumpet noise

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  #1  
Old 03-15-08, 07:05 AM
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Carrier heat pump trumpet noise

Our newly installed Carrier Infinity heat pump makes a loud snorting noise, like an elephant call, or a tool box scraping on a cement floor, a short trumpet blast. This noise lasts a second or two and only occurs in cooler weather near and below the freezing mark. Otherwise, it works fine. For the entire winter season on the coast, whenever the temperatures dips to freezing or below, we have been wakened during the night by this loud trumpet burst noise just prior to the unit going into its defrosting cycle. The unit goes into auxiliary heat to help defrost the outside coils outside and we see the steam rising.

Several visits by the installer and several calls to Carrier have been made but despite adjustments to dip switches and whatever else (no new parts) the noise persists.

It appears from the previous post that this noise problem has been around at least since 2004 and the fix required replacing the reversing valve which Carrier appears reluctant to do without putting the consumer to a lot of trouble.

Has anyone else experienced this problem?
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Old 03-19-08, 04:57 AM
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Brent,

I am thinking it is the gas escaping from high to low in the rev. valve as it is supposed to, maybe the valve is a little slow so it is forced through a small orifice to begin with making that proverbial Trumpet noise, probably wont hurt but I am sure it is annoying, if it is that bad and they will not cover the replacement , get a few quotes to replace it.
 
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Old 03-19-08, 12:59 PM
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Wink

Id say also the Reversing valve. Id lean on the company that put it in. Get them to change it.
 
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Old 11-27-11, 09:09 PM
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Thank you for replying. Carrier did send someone out in 2008 to examine and insert what I understood was a "prototype" reversing valve for the Infinity model. Whatever, the noise was quieter, but still there. It is the fall of 2011 now and the compressor has packed it in. Very expensive - $1000 for the part - but that is on warranty, the labour and new coolant are at my expense - many hundreds apparently. It appears the unequal pressure causing the reversing valve noise has fried my heat pump compressor!!!
 
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Old 03-20-13, 07:38 PM
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Mine was installed 2 years ago and I have been complaining for 2 years!! I have made videos and videos of this elephant trumpeting!! It has awakened me NUMEROUS!! TIMES.

My installer company has been very nice, but said, Carrier has NEVER HAD THIS PROBLEM BEFORE....
 
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