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Old 12-20-2015, 08:16 PM   #15
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Quote:
Originally Posted by Bambi_Bandit View Post
Can you open the furnace access door from the outside
Airstream Interstates (except maybe older T1N models) don't have an outside access door for the furnace, only for the water heater.
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Old 12-21-2015, 07:40 AM   #16
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Bambi,

Access is on the inside as prot stated. I did pull the panel and tried the reset switch with no luck. Saw the chart of error codes in the manual, but i can't see any LEDs on. I may need to disassemble the unit in order to see the control board better. It faces inward and although it looks like nothing is on, I can't be 100%. (Although I would think I should be able to see something on or blinking without pulling it apart).

Doesn't seem to be easy to access anything by just removing the outer cover and I didn't have time to work on it yesterday beyond a quick look around.

It was recommended I short out the connection wires from the thermostat to see if it turns on. Anyone able to advise exactly where I should do that?

Here's the diagram from the manual

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Old 12-21-2015, 08:14 AM   #17
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Quote:
Originally Posted by Protagonist View Post
Airstream Interstates (except maybe older T1N models) don't have an outside access door for the furnace, only for the water heater.
I have yet to see any lay-out or model year of T1N that has exterior furnace access. Everything I have seen in person and in the sales market has interior access only.
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Old 12-21-2015, 08:40 AM   #18
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From the wiring schematic that you posted, can you disconnect the +12v wire from the control board and pput 12vdc directly onto the motor to see if it starts up?

If not, that would seem to indicate that the motor is the problem, if not, then quite possibly the control board.

One thing I always do early in any attempt to diagnose problems with any appliance on the trailer is to unplug and re-plug all wiring connectors, cleaning them as well if there is any indication that it is needed. Also cleaned any ground connectors in the circuit to ensure good contact

Many times I have found such a simple thing gets everything working again. Probably you have already tried that though!

My trailers have always been bought a few years old, and as trailers age, bad electrical connections seem to be problematic.


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Old 12-21-2015, 09:03 AM   #19
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On the right side of the diagram there is a Red and a Black wire. They have some form of connection to the heater, most likely a wire nut. Find that connection, disconnect it and test for 12 volts across the red and black wires. If you have 12 volts across them, reconnect the connections to the heater, then look for the on/off/circuit breaker switch in the heater. It will have 2 red wires on it. If the switch/breaker is on you will have 12 volts from each red wire to the black wire at the connection you just attached. If not the switch/breaker is open.

You have an electrical problem and you have to find out where that problem is. If you have 12 volts to the heater then the problem in in the heater. A fuse on the control board or the board itself. If you do not have 12 volts across the red and black wire you have a blown fuse in the 12 volt panel, a dead battery, or open wire suppling the heater.
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Old 12-21-2015, 10:44 AM   #20
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Thanks all for bearing with me.

Confirmed power at the switch.

Not sure where to jump to bypass the control board.

Here's a picture. Don't want to jump in the wrong place and fry something

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Old 12-21-2015, 10:48 AM   #21
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And a shot of the control board. Doesn't look like it has a fuse on the board.

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Old 12-21-2015, 12:00 PM   #22
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Looking at the diagram and the pictures you provided, to see if the blower will run you can unplug the two red wires at the bottom of the control board (BLO and PWR), touch them together, and see if the blower will run (assuming that the thermostat is on).

Are you using a meter? If so, it would be nice to know if there is 12V at PWR on that control board.
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Old 12-21-2015, 12:10 PM   #23
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Another thought..... On the control board there is a red LED. It should indicate just like on a home furnace, and I see a white lable on the right side of the picture that explains the blinking. IF all is well and the thermostat is calling for heat, that indicator should blink rapidly (if I remember correctly.... read the label). If the thermostat is not calling for heat, that LED should blink approx. one time per second. If that LED is not blinking at all, you are not getting power to that control board.
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Old 12-21-2015, 12:59 PM   #24
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Maybe that LED is just a fault light? Not a combination status/fault light? I wish I could read that label. The main thing I'd like to know is: is there 12VDC at the PWR connection?
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Old 12-21-2015, 08:37 PM   #25
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Jump the 2 blue wires.
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