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motor won't stop running

Posted: Sun. Jan. 20, 2019 9:37 am
By: kycoalminer
combustioneer model 77-B. replaced wiring and tried 3 different timer boxes but motor and auger runs non stop. possible solutions?

Re: motor won't stop running

Posted: Sun. Jan. 20, 2019 5:17 pm
By: McGiever
kycoalminer wrote:
Sun. Jan. 20, 2019 9:37 am
combustioneer model 77-B. replaced wiring and tried 3 different timer boxes but motor and auger runs non stop. possible solutions?
Something has to be mis-wired.
Have you tried it with thermostat wires (T.T.) disconnected from the timer box?
77B Wiring Diagram (Pg. 9).pdf
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Wiring.JPG

Re: motor won't stop running

Posted: Sun. Jan. 20, 2019 7:37 pm
By: kycoalminer
yes. we think it could be the limit switch. no matter how hot it gets it wont open stopping the motor.wiring is correct had multiple people check it.

Re: motor won't stop running

Posted: Mon. Jan. 21, 2019 12:05 am
By: McGiever
kycoalminer wrote:
Sun. Jan. 20, 2019 7:37 pm
yes. we think it could be the limit switch. no matter how hot it gets it wont open stopping the motor.wiring is correct had multiple people check it.
That limit is not a day to day operational switch, but is a Safety Switch in the rare event some other control should fail you, it's sole operation is as a last resort to shut down the burner. Day to day operational control is the wall thermostat and the timer box.

If you haven't yet, disconnect the 2 T.T. wires from the timer box, do that, and that should stop the burner and if it does stop it then that is your indicator to look closer at the thermostat and or thermostat wiring as being the "short" or faulty culprit.
Sometimes the 2 wires get shorted at a box entry connector or at a wire staple pounded in just a wee too tight...

Running a new wire may be a easier task than trying to locate the problem and fixing it...

Re: motor won't stop running

Posted: Mon. Jan. 21, 2019 4:37 am
By: kycoalminer
Ok thanks. we put in a new thermostat and wiring. someone told me that i can set the timer and check the momentary switch. do you know how to set or reset the timer?

Re: motor won't stop running

Posted: Mon. Jan. 21, 2019 9:59 pm
By: McGiever
I don't know what timer you have there, but with multiple people wire checking and all new wiring you may need someone more divine than an electrician to intervene. :P