Heat pump making strange noise
#1
11-25-05, 04:23 PM
Heat pump making strange noise
Hi
I moved into my house in June 2005. It has a 2 1/2 ton Philco split system heat pump that was manufactured in February 2000.
Every so often I can hear a strange whooshing noise from the outside unit when standing in the kitchen. It's not extremely loud or high pitched, more like the sound of an air brake releasing. It only lasts a few seconds then repeats a minute or two later. After that, it may not repeat for a few hours.
This is my first house with a heat pump and I am totally clueless. The house was inspected before purchase, but because the outsidetemperature was above 60 degrees, the inspector could not test the heating. According to the inspection report, the only part of the combined system not tested was the reversing valve.
All ideas and suggestions are appreciated. Thanks!
I moved into my house in June 2005. It has a 2 1/2 ton Philco split system heat pump that was manufactured in February 2000.
Every so often I can hear a strange whooshing noise from the outside unit when standing in the kitchen. It's not extremely loud or high pitched, more like the sound of an air brake releasing. It only lasts a few seconds then repeats a minute or two later. After that, it may not repeat for a few hours.
This is my first house with a heat pump and I am totally clueless. The house was inspected before purchase, but because the outsidetemperature was above 60 degrees, the inspector could not test the heating. According to the inspection report, the only part of the combined system not tested was the reversing valve.
All ideas and suggestions are appreciated. Thanks!
#2
11-25-05, 05:17 PM
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Location: race city, usa, mooresville
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swoossing sounds from heat pump
bl1
normal sounds, but me, myself, and i would like to know the pressures in the heat pump to make sure that they have'nt been over charged. there is a pressure relief in the system to = the the compressor system. have it checked by a reputable co. 75.00-125.00 to make sure all is right. it's my guesstamation
(new word?) that it is a little bit over charged.hopes this helps, and have a great holiday season
barry
normal sounds, but me, myself, and i would like to know the pressures in the heat pump to make sure that they have'nt been over charged. there is a pressure relief in the system to = the the compressor system. have it checked by a reputable co. 75.00-125.00 to make sure all is right. it's my guesstamation
(new word?) that it is a little bit over charged.hopes this helps, and have a great holiday season
barry
#4
11-26-05, 09:08 AM
What you are hearing is the unit going into defrost.
When a heat pump is in the heating mode it actually cools the outside air. To do this the outside coil gets colder than outside temp causing the moisture in the outside air to freeze on the coil. when the coil temp drops low enough it has to defrost the ice build up so it switches to the cooling mode (outside coil gets warm) to melt the ice. The outside fan also stops (to help speed the process up) and the Aux heat comes on (to compensate for the cooling).
No worries at all.
I wouldn't even bother calling a service tech unless it is not heating like it is supossed to. If you do, I bet they tell you it is fine.
When a heat pump is in the heating mode it actually cools the outside air. To do this the outside coil gets colder than outside temp causing the moisture in the outside air to freeze on the coil. when the coil temp drops low enough it has to defrost the ice build up so it switches to the cooling mode (outside coil gets warm) to melt the ice. The outside fan also stops (to help speed the process up) and the Aux heat comes on (to compensate for the cooling).
No worries at all.
I wouldn't even bother calling a service tech unless it is not heating like it is supossed to. If you do, I bet they tell you it is fine.
