Suburban Furnace Problems
So my dad gave me his old rv that he just replaced the main board in the furnace its a Suburban model NT34 S and it seems to run fine about 3 time, then it goes to ignite the 4th time and will not ign...
Forum Discussion
JeffRil wrote:
So I replaced the valve and still a no go so I got creative, it's run by a 12v line and the valve is 12v so I got some roach clip wires and wired the power to the cable and it opens but if connected to the furnace it won't open, any ideas on THIS problem?
IF the valve opens with direct 12 volts, but does NOT when connected to the furnace harness, then you are having a drop in voltage to the Gas Valve. I would be testing on the work Bench with the furnace still inside the furnace case with a jumper wire from the gas valve to see what the voltage is thru the furnace harness. I would lean towards a lack of full 12 volts TO the furnace and not a internal furnace harness problem. My recollection of the NT34 S is, there is a small metal relay(instead of the standard time delay relay) that runs the 12 volt power for the motor and to the control board. Possible that relay the points are pitted and not supplying full 12 volt power thru the Control board to the Gas valve. Doug
