Hot Water But No Heat - 2020 T@b 400

Pekoe1111

Just bought a 2020 T@b 400 and the hot water works fine but the heat does not. The white Alde bathroom heater is cold to the touch. My Room Sensor indicator is gray, not blue. Could that be the problem?  All other settings appear to be correct (not on Delay, propane lights green). Some of the red plastic water lines near the Alde unit feel cold. Could there be a valve closed somewhere?  Thanks!

Pekoe1111

Glycol and water temps are 176 deg. 

AnOldUR

Glycol level?

MuttonChops

Pekoe1111 said:
. . . Room Sensor indicator is gray, not blue.

I don't understand 'Room Sensor'.  Please provide clarification; pictures and/or user manual references.

Pekoe1111 said:
. . . hot water works fine but the heat does not. The white Alde bathroom heater is cold to the touch.

Alde System uses City Water Pressure (or the Water Pump) to move hot water from the Alde tank to the sink/shower.  For Cabin heat the Alde has a stand-alone Circulation Pump to move the hot glycol.

1]  Confirm the Glycol Expansion Tank is at the correct level.
2]  Can you hear the Circulation Pump running (or feel it vibrating)
3]  Consider resetting the Alde System to factory default conditions.
      Control Panel Service Page,  RESET button,
        Now confirm Cabin Heat is set to a temperature above actual cabin temperature,
        Check the Setting - Circulation Pump Screen; confirm it is set to Therm
          Therm: The pump is controlled by the room sensor.
          This is the normal mode for heat and hot water.

Reference:

Pekoe1111

Thanks for your help. I reset the system and settings are set where you indicate they should be. Glycol tank in dinette window is half full. Tomorrow I’ll feel if the circulation pump is working. This is the screen that the manual says you can choose between dinette or bedroom sensors for thermostat. I may have to postpone dealing with this until Spring because I have interior it and get it into my friend’s barn for the winter. 

MuttonChops

@Pekoe1111 ;
To the best of my knowledge nüCamp does not install extra cabin temperature sensors.
The only sensor is in the Control Panel.

So make sure your "Setting a room sensor" is not active or set to Auto.
It being grayed out suggests that feature is not available/active.

Let us know when you have had a chance to experiment with the Alde System again.

Pekoe1111

Does the circulation pump have a fuse or breaker?

pthomas745

The circulation pump is 12V and is wired directly to the Alde motherboard with a connector.  On the Alde 3010, the connector for the pump on the board is in the upper right corner.  The Alde 3010 manual has a picture of a wiring schematic for the board, but the 3020 manual does not.  If you take the "service hatch" (the plastic cover on top of the Alde) off, there should be a schematic glued to the back side of the cover that will show where the connector for the pump is.

Slackers

I had this problem after a glycol exchange and merely had to turn up the pump speed (at the Alde unit under the bench).

RPMustang

Same here on turning up the circulation pump speed after a glycol exchange.

Disenchanted

Hopefully some are still monitoring this thread... 2020 T@b 400 - was in 25-40 degree temps.  Heat worked great for three days (kept me toasty at 60 degress plus).  I vented the rear heat exchanger (it had a bit of air that came out of the vent tube at the rear of the bed, and got hot glycol out once the air vented off.  The next day the heat stopped working.  I had plenty of hot water, glycol/water temps of 176 degrees, expansion tank half full. 

I tried the tilt down, tilt up exercise two times, ran the alde circ pump all the way up high. 

I have a flow unit and the rubber tube that comes out of the flow unit to the flo pump and also on to the heat loop, was HOT to the touch and very hard.  The rubber hose that goes to the suction of the alde pump was cold to the touch, and squishy... i could pinch it closed and let it spring back open.  I vented the kitched heat exchanger (under the sink) and the bathroom heat exchanger (glycol right away, no air).

It seems like there is a blockage in the heat exchanger loop.  Has anyone experience a failed check valve (that is the only component downstream of the Alde/Flow unit before the under bed heat exchanger).  

Any ideas??