Just went through 2 yrs of HVAC and still learning. Came across a Lennox unit and the contactor will pull in rapidly several times and finally stay closed, no apparent loose wires, i have limited experience but I'm thinking it might be the 24v contactor going bad or at least the problem is on the 24v side. Any help?
24v contactor
thehero
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Just went through 2 yrs of HVAC and still learning. Came across a Lennox unit and the contactor will pull in rapidly several times and finally stay closed, no apparent loose wires, i have limited experience but I'm thinking it might be the 24v contactor going bad or at least the problem is on the 24v side. Any help?
Measure the coil voltage when it's pulled in. Should be no less than 21vac for reliable operation. If it's lower than that, you have a control system problem.
Another possibility is the motor load is excessive and kicking the contactor back. Watch it pull in. If there is a lot of arcing, that may be the cause. In that case you could have a motor winding short or bad capacitor.
Another possibility is the motor load is excessive and kicking the contactor back. Watch it pull in. If there is a lot of arcing, that may be the cause. In that case you could have a motor winding short or bad capacitor.
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5 major components not including wiring. Think. But it might not be any of those 5.
[Edited by keepitsimplestupid on 08-09-2006 at 09:45 PM]
[Edited by keepitsimplestupid on 08-09-2006 at 09:45 PM]
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