Gas and Oil Home Heating Furnaces - Vulcan Space Heater
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david jamieson
04-23-06, 05:46 AM
I have a vulcan gas space heater which will not ignite.
If I put a multimeter from the thermocouple (prover?) connection on the ignition module to neutral the burner will ignite.When the burner is ignited by this method the ignition sparks constantly, I am sure that it used to turn off after ignition.
I tried cleaning the thermocouple (prover?) no joy, after reading previous threads it seems that I need to replace it.
I cant understand how the dc current is sent from the thermocouple, and should it not just shut off the gas in the event of flame failure... why would it stop the burner igniting?
Am I on the right track? the resistor and the capacitor have both checked ok, there doesnt seem to be alot else that could go wrong except for the gas solenoid coil? Any help greatly appreciated.
Since posting I have found that the thermocouple is called a flame sensor, and that it prvides a DC current as a result of the flames acting as an energy source.
As before if I put one prong of my meter on the ignition module (where the wire from the flame sensor joins) and the other to neutral the burner ignites, meter set to measure AC current.
When I set the meter to measure DC current and connect as above the burner cuts out.
I have ordered a new sensor, any ideas if it is not the sensor?
If I put a multimeter from the thermocouple (prover?) connection on the ignition module to neutral the burner will ignite.When the burner is ignited by this method the ignition sparks constantly, I am sure that it used to turn off after ignition.
I tried cleaning the thermocouple (prover?) no joy, after reading previous threads it seems that I need to replace it.
I cant understand how the dc current is sent from the thermocouple, and should it not just shut off the gas in the event of flame failure... why would it stop the burner igniting?
Am I on the right track? the resistor and the capacitor have both checked ok, there doesnt seem to be alot else that could go wrong except for the gas solenoid coil? Any help greatly appreciated.
Since posting I have found that the thermocouple is called a flame sensor, and that it prvides a DC current as a result of the flames acting as an energy source.
As before if I put one prong of my meter on the ignition module (where the wire from the flame sensor joins) and the other to neutral the burner ignites, meter set to measure AC current.
When I set the meter to measure DC current and connect as above the burner cuts out.
I have ordered a new sensor, any ideas if it is not the sensor?