A constant hummmm

10-18-2006, 08:10 PM	#1
randalg Newbie   Join Date: Jul 2006 Posts: 21	A constant hummmm I noticed the other day that our outside unit has a constant humming noise coming from it. I don't remember hearing it during the summer. We just turned on the heat last week. Any ideas? Would a visit from the local a/c man be in order? Thanks for any help!

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10-18-2006, 09:02 PM	#2
oddjob Member   Join Date: Sep 2005 Posts: 57	A constant hummmm Is it a heat pump or split system?

10-18-2006, 09:20 PM	#3
randalg Newbie   Join Date: Jul 2006 Posts: 21	A constant hummmm it's a heat pump.

10-18-2006, 09:34 PM	#4
oddjob Member   Join Date: Sep 2005 Posts: 57	A constant hummmm Sounds like the coil on the reversing valve, switch it back to cooling which should deenergize the coil to see if the humming stops and having your system serviced is a good idea.

10-18-2006, 09:42 PM	#5
randalg Newbie   Join Date: Jul 2006 Posts: 21	A constant hummmm Thanks, oddjob! I'll try that and make a call tomorrow.