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Old 10-12-2017, 08:11 AM   #1
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Heat trouble with 2017 SDF

Heat has been working fine, then became intermittent. Last night it would not run long enough to satisfy thermostat, and then it quit. Went outside and cycled the "On/Off" switch and it came on but still didn't satisfy thermostat. No there is nothing happening no matter what I do. Thermostat clicks, but that's it. I'm in Colorado and it's near freezing here at night. Any input would be greatly appreciated. Rockingtom or any other jedi master have any ideas?
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Old 10-12-2017, 09:07 AM   #2
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re: heat problem

I found a red wire with the thermostat wiring that was labeled "Heat Pump #235." Does this mean that one of these A/C's have heat capability? It was not connected to anything. As well, is this 25k btu heater going to be enough heat for this big of a fiver in the cold climates of Erie, Pennsylvania? Thanks in advance.
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Old 10-14-2017, 07:20 AM   #3
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Colorado, Are all your floor furnace registers open and flowing. You are describing a overheating of the plenum issue. If all are flowing well, then you may have a high limit switch that's failing......but if that was the issue, the flame would go out and then come back down when the temperature in the plenum dropped.

Not familiar with heat pump other than theory of operation.
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Old 10-14-2017, 03:15 PM   #4
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Colorado,
Had a similar problem with my gas heater and it turned out to be the control board. You can look at the thread below to view my heater symptoms and others comments.

As for a heat pump, I have one in the living area. Haven't had much use for the heat pump or gas heater. Travel mostly in the summer. Usually use gas heat when I am being charged for electricity used.

If your thermostat has two settings, one for electric heat and one gas heat, you may have a heat pump. If your thermostat has the electric heat setting, move the switch to electric heat. If the A/C comes on and there is heat coming out of the A/C, congrats, you have a heat pump. The thermostat wire may be use for both heat pump and conventional A/C so a heat pump may be added later without running a new thermostat wire.

Heating Problems
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Old 10-15-2017, 11:08 AM   #5
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re: heat problem

Thanks for the quick responses guys. My registers are all clear as well as the returns. I believe that it could be the secondary board inside of the Suburban two stage furnace. I recall not feeling like the second stage was working even when the system was otherwise functioning. Heat was weak and slow to warm trailer. Now that absolutely nothing happens it is suspect. I changed the main control board and still had nothing. The second board is all that's left in my mind. Jumping the fan out made it run, but power going from the main board to the secondary board didn't make it run. Controls are not my forte but we'll see tomorrow when the replacement board shows up. Again, thanks for your help.
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