Re: A/C compressor won't shut off
- From: "Moe Jones" <moejones@xxxxxxxxxx>
- Date: Mon, 20 Aug 2007 14:18:29 -0500
Zyp wrote:
Meat Plow wrote:
On Mon, 20 Aug 2007 07:58:23 -0500, Peabody wrote:
Everything seems to be working fine, but then when the thermostat
trips off, and the furnace blower fan turns off as it should, the
compressor outside keeps running. If I take the cover off the
electrical section and give it a sharp rap, it lets go and turns
off. So it appears it has to be a relay that's not letting go.
Well, all I can see in there is the main contactor, which has pretty
pitted contacts, and the hard-start relay. I was planning on
replacing the contactor, but wondered if it could possibly be the
start relay that's not letting go.
Contactor relay.
Replace the contactor, wash the condenser coil. It's likely dirty,
causing unsually high amperage draw, heating the contractor contacts
and 'welding' them together. Also, replace the air filter to limit
long run times.
I would agree with changing the contactor but a high head would not cause
the contacts to burn and pit.
I would think worn out contacts and check your hard start cap. to see if you
spot any damage. If so replace the relay and cap.
I also agree that you should wash your coils and change your air filter.
--
Moe Jones
HVAC Service Technician
Energy Equalizers Inc.
Houston, Texas
www.EnergyEqualizers.com
.
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