PatrickFisherPr
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Drawing more than 12 volts off auxiliary battery
I have a 1984 Toyota Sunrader. Under the hood is an auxiliary battery, which charges off the alternator. The auxiliary battery operates my water pump and the furnace. The furnace requires approximately 13 volts to open the gas valve and spark the ignition. It appears I only get the proper voltage to start the furnace when I turn over the engine. Any thoughts on how I can draw more power from the auxiliary engine without having the vehicle's engine on? The furnace kicks off if the RV reaches the temperature to which my thermostat is set. If the RV reaches that temperature and the engine isn't running then it doesn't have enough power to reignite the ignition if temperatures drop. Any insight would be very appreciated.2.6KViews0likes12CommentsRe: I need help with Suburban NT-12SE Furnace!
I appreciate your responses. Here is the furnace manual. The wiring diagram is on the last page. http://manuals.adventurerv.net/Suburban-Install_NT-12SE_NT-16SE_NT-20SE.pdf The power going in to the furnace is a bit over 13 volts. The blower kicks on. It runs continuously without the gas valve opening or the ignition sparking. After the blower runs the sail switch is closing. It is remaining closed. I didn't mean the wire from the fail switch is hot in temperature. I meant it is live. I think the issue is the contact arrangement on the board. From left to right they are as follows: Number one is the red wire, +12V DC Two and three have no wires Four is the brown wire, which turns gas on Five is the black wire, which goes down to the electrode Six is the yellow wire, -12V DC I just bought a wiring kit, model number 520840, hoping that will resolve my issue. Any additional thoughts would be greatly appreciate. If someone can confirm the contacts that would be a massive help.598Views0likes0CommentsI need help with Suburban NT-12SE Furnace!
I have a 1984 Toyota Sunrader. I've completely renovated my Sunrader. I'm approximately 98% done with renovations, but I'm having issues with my Suburban furnace. I have a Suburban NT-12SE furnace. The blower operates but the gas valve does not open and the ignition does not fire. Initially I thought it was the control board. I purchased and installed a new board. Even with the new board installed the valve does not open and the ignition does not fire. I emailed Suburban and they said it could be my limit switch. The wire going from the limit switch to the control board is hot. Could the limit switch be the problem even if the wire is hot? I based wiring off the diagram provided in the Suburban manual. I would appreciate any insight.2.2KViews0likes10Comments
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