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Old 10-02-2015, 10:47 PM   #1
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Heater not working

Ok here I go. The refrigerator in my rockwood was leaking from the cooling unit. I removed the refrigerator and replace with a mini fridge. Now my furnace is not coming on. All fuses are good. I can hear a click when I turn the heat on , but no fan or heat on the furnace. Scratching my head. Any info will be helpful.
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Old 10-02-2015, 11:02 PM   #2
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Jumper out the red and white wire at the stat and see if it will fire off. might just be the stat. start there. Other then that you should be looking at the circuit board.
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Old 10-02-2015, 11:16 PM   #3
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It is possible the Fridge and Furnace are on the same fuse. Mine Fridge and Vent hood are on the same circuit. Make sure the wires from the 12 volt side are reconnected together to feed 12 to the Furnace or the fuse is not blown.
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Old 10-03-2015, 01:09 AM   #4
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Quote:
Originally Posted by michael baldauf View Post
Ok here I go. The refrigerator in my rockwood was leaking from the cooling unit. I removed the refrigerator and replace with a mini fridge. Now my furnace is not coming on. All fuses are good. I can hear a click when I turn the heat on , but no fan or heat on the furnace. Scratching my head. Any info will be helpful.
Start
Thermostat Calls
for Heat
The wall thermostat controls the operation of the furnace by reacting to room
temperature, this allows current to flow through the On/Off switch to the module board.
The module board constantly checks for a minimum 9.5 volts. If there is not 9.5 volts,
the module board will go into a stand by mode until adequate power is supplied. It will
then resume normal operation.
Upon a call from the thermostat, the module board thermostat circuit will go active. The
sail switch circuit is verified as being open. The blower output is energized. Blower
motor starts.
15 Seconds Purge
Cycle
The module board will then verify that the sail switch circuit is closed and motor is up
to speed. If this circuit remains open for 30 seconds after the blower motor starts, the
module board will go into lock out and shut down the blower motor.
The module board checks that the gas valve relay contacts (which are located on the
module board) are open before the ignition sequence starts.
The board has a pre-purge timing circuit of (approximately 15 seconds). This allows the
chamber to purge.
7 Seconds Ignition
Cycle and Flame
Sense
The module board will energize the gas valve and enable the high voltage spark output
to the electrode for 7 seconds of ignition time.
The module board will then check for flame sense to verify successful lighting of the
main burner flame. Sparking will then be terminated and the gas valve and blower
outputs will remain energized.
If ignition is successful the module board will monitor the flame sense, sail switch and
limit switch circuits, and the thermostat inputs during the heating period.
The flame is sensed through the spark wire and electrode. Therefore, it is essential that
the electrode is properly positioned in the burner flame.

furnace needs 9.5 volts to operate. It is a 12 volt power hog. Plug the tt into 110 volt house power to charge battery and provide a solid 12 + volts to the trailer furnace. The information I coped above is from the library tab in the green bar on the top of the page.

Hope this helps Tim
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Old 10-03-2015, 06:56 AM   #5
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Thanks everyone I reconnect the 12volt wires together and it worked. Love this site
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