matt_r wrote:
MFL wrote:
Normally you have an access door inside the trailer. If you leave this open to circulate warm air to the heater and pipes, it should help. You can use a fan forced electric heater, or hair drier aimed at the heater and pipes from the inside to thaw.
Jerry
Found it. I out an electric heater inside. I am guessing the issue is where the hot water line goes into the belly.
The system is designed for the pipes to be protected by the furnace. If you are using an electric heater the pipes will freeze because there is no heat circulating underneath.