Question about Honeywell HZ-510MP Ceramic Heater
I bought a used HZ-510. It seemed to work fine pre-purchase.
After getting it home, it cycles off and on.
On about 1 to 3 min and off 3 to 5 min.
I removed the cover to diagnose the problem. I cleaned the temperature sensor located right over the ceramic coils, it had a small amount of dust. The thermostat seems to operating properly as it calls for heat and stops calling when it is turned down or is satisfied.
The fan is operating, the blades are clean, the coils are clean. I see nothing that would indicate improper air flow.
The only thing that is throwing me is what apears to be a temperature sensing device on the thermostat knob itself.
With the pendulum type wighted cylinder that opens the contact.
It is getting hot to the touch, is there a desighned temperature it is supposed to reach and not exeed?
I understand that being purchased used and not being the original owner it may not be under warranty.
Any ideas as to what is the problem and where to get parts if needed?
By the way, I am a heating and air conditioning contractor in NC if that makes a difference. MY HONEYWELL HZ-510 PROBLEM DESCRIBED BY meBNme IS THE
SAME PROBLEM I HAVE. ANY SOLUTION YET? PLEASE LET ME
KNOW. THANKS. BOB
There is no "official" way to fix this problem, but I did find a solution. You have to open the case by removing the 6 security screws on the bottom, and pull the height and thermostat knob off (they just pull off easily). You will see on the underside of the thermostat switch, a dangling weight (the tilt sensor). It is attached to 3 sandwiched metal arms. The very bottom arm is designed to bend upward when it gets hot, and it lifts the contacts apart. If you bend that bottom arm downward just a little (don't go too far, or you'll lose the thermostat feature altogether) it will allow the arm to heat up to a more reasonable temperature before shutting the heat off. Just reassemble, and it should work!
Posted on Apr 26, 2013
Here is a link to manual and trouble shooting guide. Also service numbers and e-mail contacts. Hope this helps, Thanks and let me know,
Posted on Feb 01, 2009
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