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Old 10-31-2015, 10:02 AM   #1
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Monaco Owners Club
Join Date: Sep 2015
Location: Murfreesboro tn.
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Question help with furnace

Hello all, first we are rv newbies ,we bought a 2004 Monaco, its been winterized but i wanted to do some inside work on it but i cant get the furnace to turn on at all. i have LP generator is running and i get nothing?? help
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Old 10-31-2015, 10:33 AM   #2
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The furnace must have 12 volt DC present to operate, its control board and blower fan run from 12 volts so they can work when you are dry camping with generator off during quiet hours. Should have had 12 volts from the converter with generator running, so even if you had operated the coach battery disconnect switch you should have had 12 volts available to the furnace.

Since you are newbies here is some basic stuff don't take offense if some are too obvious...

1. Thermostat in Gas Heat switch position?
2. Thermostat set to call for heat?

If those are done and you have 12 volts, right after you move the thermostat to call for heat listen for its spark ignitor clicking making sparks to light the pilot, then the pilot heats the thermocouple which lets the control board open the main gas valve to the big furnace burner.

A lot of control boards will try to light pilot only 3 times then "lock out" so you may have to switch the thermostat to off and then back to heat to reset this. If you had air in your propane line you may have gotten locked out and take several tries to get the air out to the furnace before there is propane to light the pilot and get things going.

One last thing - if you don't have wasp guards on your furnace air intake and exhaust ports on the outside of the camper your furnace may not be operating due to wasp nests built inside it.

Good luck.
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Old 10-31-2015, 10:58 AM   #3
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Quote:
Originally Posted by The Enochs View Post
Hello all, first we are rv newbies ,we bought a 2004 Monaco, its been winterized but i wanted to do some inside work on it but i cant get the furnace to turn on at all. i have LP generator is running and i get nothing?? help
Quote:
Originally Posted by powercat_ras View Post
The furnace must have 12 volt DC present to operate, its control board and blower fan run from 12 volts so they can work when you are dry camping with generator off during quiet hours. Should have had 12 volts from the converter with generator running, so even if you had operated the coach battery disconnect switch you should have had 12 volts available to the furnace.
Since you are newbies here is some basic stuff don't take offense if some are too obvious...
1. Thermostat in Gas Heat switch position?
2. Thermostat set to call for heat?
If those are done and you have 12 volts, right after you move the thermostat to call for heat listen for its spark ignitor clicking making sparks to light the pilot, then the pilot heats the thermocouple which lets the control board open the main gas valve to the big furnace burner.
A lot of control boards will try to light pilot only 3 times then "lock out" so you may have to switch the thermostat to off and then back to heat to reset this. If you had air in your propane line you may have gotten locked out and take several tries to get the air out to the furnace before there is propane to light the pilot and get things going.
One last thing - if you don't have wasp guards on your furnace air intake and exhaust ports on the outside of the camper your furnace may not be operating due to wasp nests built inside it.
Good luck.
The Enochs
Did your so called "salesman switch" somehow accidentally get turned OFF?
Much of what powercat_ras said is true...
However on most coaches if the "salesman switch" is OFF the house appliances, (including the LP furnace), will NOT get the 12VDC power they NEED to operate.
Mel
'96 Safari
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Old 11-01-2015, 04:35 PM   #4
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Location: Murfreesboro tn.
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Quote:
Originally Posted by The Enochs View Post
Hello all, first we are rv newbies ,we bought a 2004 Monaco, its been winterized but i wanted to do some inside work on it but i cant get the furnace to turn on at all. i have LP generator is running and i get nothing?? help
Ok being the Newbies I didn't think about the little cut off switch inside the door of our coach😳 ........ So thanks to all but I learned that if my wife bumps it I need to check the switch 1st. Got it now thanks again
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