I have a type R8411029 contactor controlled by a series 80 thermostat.The contact don't open causing the baseboard htr to remain on. I have already replaced the contactor once with the same problem last year. It worked fine but now but now I have the same problem again.These contactors aren't cheap(over $100.00).Help will be greatly appreciated. Charles Howell [email protected]
Heating & Cooling - Honeywell - Programmable Thermostat Heater
Answers & Comments
Hi Charles. I'm going to try to provide some helpful information though it may not be completely what you are looking for. Please don't rate me poorly. :-)
First, It is important to ensure that the contact rating is properly sized for the voltage/current of your circuit.
Second, It is important to keep the contacts of the contactor clean. If an insect were to climb inside the contacts and the contactor pulled in, it would leave the contacts dirty and cause "pitting" of the contacts which, in turn, leads to contacts that stick.
You might want to inspect your contactor contacts for a "pitted" condition. If the contacts appear to be okay, the problem could be internal.
You might be surprised at how helpful some electricians might be. You can always take your contactor to an electrical supply house and have them inspect it and offer their opinion based on their observation. If you choose this route, you will want to have information regarding the coil voltage, contact voltage and circuit ampacity.
I hope this helps. I wish I were closer to be of more help.
Good Luck! :-)