home
Comparing over 45,000 air conditioners, boilers, furnaces and heat pumps
CONNECT with us!

our tools and detailed reports
can help you choose the best
furnace, boiler, heat pump or
central air conditioner.

See all questions

Heat pump making a hissing noise

Post created: 2012-11-08 Type of Equipment: Heat Pump Views: 84

This question was created on the page: http://www.furnacecompare.com/heat-pumps/index.html.


On 2012-11-09 JB wrote:

Hard to say what this could be without more information. The first question would be is it a new system or new to you (e.g. you just moved into the house)? I would also ask if this is happening as the heat pump is transitioning from cooling to heating or vice-versa?

If so it may be a common noise associated with the heat pump going into a defrost cycle.

The noise could also indicate that a valve inside the compressor (internal relief valve?) is faulty and needs to be replaced. If this is the case then you will need an HVAC pro to come and do a diagnostic to determine the problem and replace the valve if that is what's required.

Best of luck!


Your Answer


Name:
Copyright 2002 - 2014 furnacecompare.com