Forum Discussion
pianotuna
Sep 19, 2015Nomad III
Hi,
I had a similar problem in my Class C. The heater for the cab would prevent the furnace from cycling leading to freeze up of the fresh water lines.
I tried putting a 1500 watt heater in cabinet and running it via my inverter. That did not solve the problem.
What did was replacing the cold air return grill for the furnace with a dual window fan unit. I have it thermostatically controlled with a mechanical thermostat which I place beside the water lines. The warm cabin air blows through and keeps freeze ups from happening.
As an added bonus some air circulates through the furnace duct work.
Do stay away from 'computerized' thermostats and fans. If the power goes off for a second or so, they will default to a power off situation.
If there is an outdoor shower, insulate that area, or do as I did and remove it--then insulate.

I had a similar problem in my Class C. The heater for the cab would prevent the furnace from cycling leading to freeze up of the fresh water lines.
I tried putting a 1500 watt heater in cabinet and running it via my inverter. That did not solve the problem.
What did was replacing the cold air return grill for the furnace with a dual window fan unit. I have it thermostatically controlled with a mechanical thermostat which I place beside the water lines. The warm cabin air blows through and keeps freeze ups from happening.
As an added bonus some air circulates through the furnace duct work.
Do stay away from 'computerized' thermostats and fans. If the power goes off for a second or so, they will default to a power off situation.
If there is an outdoor shower, insulate that area, or do as I did and remove it--then insulate.

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