Furnace no run

[Jlb27537]

Hi All,

2014 3150RL with a Dometic Comfort Control Center 2.

This morning turned on the LP furnace. The A/C fan came on. No furnace. Did the thermostat reset per instructions. No change.

It worked a month ago, but not now? Any ideas? Put it on AUTO, same thing.

Was 36 degrees outside this am, temp set @ 70.

Thanks Jim

 

[LCBoyer]

Check your propane, turn burner on stove to see if it has air in line

 

[Jlb27537]

Water heater works, stove works, If you are out of LP the furnace blower will run but not ignite, after 3 attempts to light it will go into lock out and only the fan will run. Then you have to turn furnace off, and re-try.

The furnace fan never runs, instead the a/c fan runs.

Jim

 

[Ozz]

There is a re-boot you might have to do, but if we can't come up with that, kill the power to the A/C: Breaker, pull the fuse to the furnace, this is a hard reset, or re-boot, it may work then, I doubt the fan is bad with your new unit, BUT, you never know.

 

[Jlb27537]

OZZ,

Turned battery switch off. Back on. Removed fuse to thermostat. Wait 60 sec. Re-install fuse. Kill breaker to A/C zone 1. Set thermostat to furnace. Nothing. Turn breaker on to A/C zone 1. A/C fan comes on.

Turn everything off. Remove furnace grill. Cut control wires to furnace. Connect 2 blue thermostat wires. Furnace runs and heats as normal. Re-connect control wires. No change.

Thermostat set to control furnace, A/C fan runs. Problem not furnace. Thermostat or control board in A/C defective?

Know how to check either? Have wiring diag for A/C and control board?

Maybe need some sort of reset for thermostat that is not in owners manual........

We have 2 elec heaters so will not freeze. 36 degrees this morning @ 9,400' with 50A service.

Life is good, furnace, not so good.

I'll call Dometic Monday.

Jim

 

[Rondo]

Sounds like a trip to the dealer to have some warranty work done!

 

[Ozz]

Cycle the thermostat to off..(No display) press and hold the + button first and without releasing it, press the On/Off button and hold. After a few seconds the display will indicate--, Release both buttons and then press on/off button to turn off the system. In the thermostat manual this is called the 'System Initialization' which should have been performed by the installer.
I don't have one of these, and am not familiar with your unit, so it may not apply, but heck, give it a try.
Good luck with it Jim.
Remember the old round Honeywell T87-f mechanical thermostats? Never a problem. Dang technology!
Glad you are having a good time and enjoying yourselves ..other than that.
Meanwhile, just turn the breaker off to the A/C unit, that will solve that problem.
Ozz

 

[Jlb27537]

Ozz,

In the owners manual I have for the Comfort Control Center 2 which is the thermostat with the round display it says:

System Reset procedure:
1 Make sure CCC 2 thermostat is OFF
2 Press MODE and ZONE together. The LCD will display "IniT" and all available zones.
3 Release the MODE and ZONE buttons
4 Press the On/Off button to exit set up.

Is the instructions you gave me for the CCC 2 thermostat or for the old 4/5 button?

It used to work properly. So the dip switches are set properly and when you cycle thru the display it displays what is connected.

If I do not get any help from Dometic today I'll get a mechanical stat and wire it in and deal it when I get home. I am in the middle of Colorado on top of a 9,400' mountain and the closest place for parts is 100 miles over a 12K pass.

The A/C part of it works fine on both zones. The furnace on zone 1 is the only thing that does not work.

Jim

 

[Ozz]

There are installer set-up instructions and owner instructions, so they will be different. BUT I don't know which thermostat this is for, but it's all I have.
Ypou might try 'Google' and installer instructions for your thermostat.
Good call on the mechanical.
Ozz

 

[Jlb27537]

Ozz, page 12 of 14

http://edometic.com/allusr/pdoc.nsf...CC2 with separate control box_3312792.017.pdf

Jim