Is it common..even when the heater is working

RV pillow vent covers in ALL your roof vents. Found at all RV stores.
The vents are not sealed and they are plastic and all the heat goes right out thru them. Just putting a pillow vent cover in them will make a BIG difference.

In real cold weather I cover all the coach windows with van sized windshield sun shades. Walmart carries them. They will fit right under the day night shades without having to put velcro on any part of your coach.

Just doing these 2 simple things will increase the temps inside by 20 degrees. And for me that is WITHOUT the coach heat on, only the dash heat.


RV vent pillows with silver on one side that also keeps the heat out during the summer months. Fits snuggly inside rv vent with 'out' having to put any tapes on your coach.

When you are driving...that's when you find out where the air leaks are, areas that aren't as insulated as we'd all like and the limits of dash heat versus propane furnaces.

Your dash heat should make a big difference but if you don't feel warm enough, I agree check it out for problems. But it's more than heat out put...

The area around entry doors are notorious for air leaks, front caps usually don't have insulation behind cabinetry and windows will feel colder and maybe you'll even feel air leaks from the window track weep holes. Also check all around slide-outs, especially at the floor, around pipes, power outlets, etc.

We traveled one year in December and January in the west and northwest in temps as low as zero. So, we used our mirror heaters for the 1st time and ran both suburban furnaces the whole time along with the dash heat. At one point, you betchya I wore my insulated coveralls and winter boots indoors sitting by the entry door.

After your 1st cold drive make adjustments to create a comfortable environment...put on warmer clothes, and yes, turn on those propane furnaces. Not only will you be more comfortable but the pipes and plumbing in the utility bay will have a better chance of staying thawed!

Something is wrong. We travel the north in the winter months. The dash heat and motor-aid keep it nice and warm. No jackets in transit for us!

Sounds like the heater core might be plugged up not enough flow! Was hot air coming out of the vents? or just warm? check with a thermometer and see what ya get should be well over 100f

Our 36' Holiday Rambler Endeavor keeps us nice and warm. Our Endeavor has the front dash heater plus a rear heater. Have never had to use gas heater or heat pumps when on the road even in freezing temps. Check around the base of your bed. If there are vents, ours has them, you probability have a rear heater. Just need to find the on/off switch. My switch is on the right side of the dash near the top & marked rear heater. Good luck.

rocmoc n AZ/Mexico

I just turn on the heat and let the engine heat the coach thru the AQua Hot. Works well and my passenger usually complains it is too hot at times. The dash heat works too but the rest of the coach gets cold so just the Aquahot and the engine heat works great. Oh the engine coolant runs thru the Aquahot so I am not using any extra fuel to heat. If I was sitting in blamkets and gloves that coach would be gone. I love winter camping.

Is the heater blowing out hot or cold air??? Does your motorhome have valves in the engine compartment to turn on for the hot antifreeze to go to the heater core? Could be the dash cable control is not turning on the heat.

SuzzeeeQ2012 wrote:

we were driving in 40's for the 1st part of the drive, to 32 on the pass. c-c-c-c-c-cold enough to cover my nose. Something is wrong, it's not supposed to be that cold IMHO.


we were using the dash heater.

Yeah, something is definitely wrong. You should be nice and toasty.

mena661 wrote:
Our dash heater works great down into the 20's (better than the dash A/C). Never driven the MH in any temps colder than that. Furnace puts out PLENTY of heat when used. Never been even remotely cold with either running.

we were driving in 40's for the 1st part of the drive, to 32 on the pass. c-c-c-c-c-cold enough to cover my nose. Something is wrong, it's not supposed to be that cold IMHO.


we were using the dash heater.

Our dash heater works great down into the 20's (better than the dash A/C). Never driven the MH in any temps colder than that. Furnace puts out PLENTY of heat when used. Never been even remotely cold with either running.