Main Burners won't ignite


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Old 11-28-09, 09:05 AM
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Main Burners won't ignite

Dayton Gas heater.

Thermostat appears to be working. After hearing a click at the thermostat, about a minute later the fan starts to blow. One problem, main burners don't ignite.

Pilot light is lit.

Any help would be greatly appreciated.
 
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Old 11-28-09, 09:14 AM
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You have an old furnace with a pilot light that is lit all the time?


Use a multimeter across the electrical terminals of the gas valve to see if you have power to turn the gas valve on when the thermostat is turned up. If you do, check for continuity across the gas valve to see if it's burned out.
 
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Old 12-01-09, 12:08 PM
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Problem solved! The vent limit switch needed to be reset! Works now. Guess I am not sure why is tripped over the summer?
 
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Old 12-01-09, 12:11 PM
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Problem solved! The vent limit switch needed to be reset! Works now. Guess I am not sure why it tripped over the summer?
 
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Old 12-01-09, 04:07 PM
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Did you figure it out yourself? If so, very good. Who needs furnace guys, eh?

Did you look at where all the wires went and all the little devices at their ends? and went, "Hmmmm....I wonder what THIS thing does?"...and then found a little reset button and pushed it in? If so, you are well on your way to becoming a good DIY-er.

Now you might have to go, "Hmmmm", one more time to try to figure out what made the vent temp too hot.
 
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Old 12-01-09, 04:40 PM
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hmmmmmmmmm

like ecman sez....what caused the vent switch to trip.....over the summer......clogged chimney.....birdsnest...........chimney settled-shifted partially blocked......those types of switches are pretty reliable.......you need to check venting of the gas appliance soon..............
 
 

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