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Posted on Jan 02, 2017
SOURCE: Heater will not turn on
If these are newer units 5 years or newer, there may be a thermal safety device up near the top. Follow the wires to find it. if you have this, bypass it by connecting the two wires going to it to each other and not the little disc. If this does not get the burner to ignite, then the next culprit or you do not have one then next is the pilot generator. This is the round cylinder next to the pilot flame. It and has 2 wires connecting to the gas valve. Remove it from the pilot assembly, it usually is just a clip, unscrew the 2 wires and pick up a new one. The connection on the gas valve has these wires labeled as TP for thermopile (dont ask, I don't know) replace in reverse as removed.
Posted on Dec 18, 2007
First make sure this is a heater set up for a remote mounted thermostat. If so, the gas valve has 3 screws labeled TH (thermostat) and TP (thermopile) that's the flame sensor with 2 wires coming off it, I don't know where the goofy name comes from. there will be one screw that has both, usually the top one. Wire accordingly. The new valves have a solenoid on the bottom. this connects to the high temp. sensor up top. It has 2 wires on it, one connects to the thermostat wire, the other goes to the screw with TH and TP. Or you can skip it and connect the wire from the back of the valve to the Th and TP screw. Make sure the thermostat wires aren't pinched somewhere, thus eliminating the thermostats control.
Posted on Mar 02, 2008
Question, is this bang a metal sound or like a small poof of a gas burner? If it is a metal "bong", it is the heat exchanger expanding. You could hit the combustion chamber with a hammer causing a dent (really) and it may take the noise away. If it is a "poof", it should be looked at by a technician.
Posted on Jan 04, 2010
open it up and you'll see it while its running sounds like fan bearings or fan misalignment may need a new fan motor. if you replace the fan though make sure all power is off before disconnecting
Posted on Jan 24, 2010
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