Dash heat & defrost diesel pusher?

Mine works pretty good. Probably need to have it checked out.

Ours blows hot air but it takes a couple of minutes for hot air to come out after turning the dial to heat. No doubt that is because the hot coolant has to travel almost 40 feet.
Our coach also has 6 inch fans in the top corner of each side of the windshield. In cold weather it helps a lot in circulating the warm air across the windshield.

Modern propane furnaces don't exhaust humidity back into the coach.

Ours works very well. Takes a couple of minutes after a change to the temperature dial for the hot water to circulate the length of the coach and heat the mass of the front coils, and then she’s pumping heat. Maybe 2x the amount of a typical car I’m guessing. Which is needed for all the wide open space and glass.

Ours works great. We also have overhead fans that blow directly on the windshield.

Cab over truckers use a vinal cover that snaps on the front covering the radiator to hold the heat in the radiator.

1.You appear to have a 15 year old unit.
2.Dash Heat will be in the 145 to 165 range on a Diesel
3.It is not uncommon on a unit as old as yours to have a clogged Water valve restricting the volume of hot water
4. You need an actual temp measurement of the hot air coming out to determine if you have a problem. Doug

dougrainer wrote:
1.You appear to have a 15 year old unit.
2.Dash Heat will be in the 145 to 165 range on a Diesel
3.It is not uncommon on a unit as old as yours to have a clogged Water valve restricting the volume of hot water
4. You need an actual temp measurement of the hot air coming out to determine if you have a problem. Doug

Also need to compare temp of hoses at both ends. Might be loosing heat because the hose runs thru cool area, or because of limited water flow.

If you are getting condensation from your propane durnace, GET IT SERVICED ASAP! This is not normal, and indicated a cracked burner compartment.

As for better dash heat... there are many supplemental diesel-coolant heaters on the market, and can supply heat when parked if you add the electric water pump option.

The one thing I found which I need to follow up on is the temp of the hose entering the firewall going to the heater one hose is warm to the touch but the other hose is not very warm. This leads me to believe it either has a heater valve that is broken or the heater core maybe plugged. I know some automobiles use a heater valve do these Freightliner units use a heater valve? I plan to remove the 2 hoses and see if I can blow air or water through the core. If the heater unit uses a valve it must be electric operated there is no cable like some of the old autos used.

Getting to the heater unit is a pain I need to remove part of the dash to get access.