New Coach on the Road Home

[MangoMike]

Also the Webasto won't fire if the coolant temp is over (140 to 154 depending on your version).

MIke

[lloyd&pamela]

Truk4U - registered today for Amana, look forward to seeing you there. If Jon finds any paper I may have to hock the bus to pay him, his advice has been priceless.

Dale I have a list started already.

Ray I have 5 switches over the drivers area:

Bedroom AC
Dash AC
Galley AC
Central Heat Control
Interior Heat Exchangers

On the consol to the right of my legs there are:

Bedroom blower (off, low, med, high)
Living Rm blower (off, low, med, high)

Note: these two dials are repeated in the kitchen with the same choices.

There is a thermostat in the living area and the bedroom.

If I switch on all the switches and turn the thermostat up the webasto comes on ("heater on" indicator lights up between the central heat control and interior heat exchangers switches), BUT even turning the fan to high yields no hot air from the vents and very little air flow at all.

There is also a separate fresh water heater switch in the panel over the passenger front window.

While driving the water temp has been around 200.

[Ray Davis]

Lloyd when you turn on the Central Heat Control, and adjust the thermostat do you hear the Webasto start up? It will sound like a small jet engine, very noticable.

If you are not getting airflow, I would assume your fans intakes/outtakes are dirty and may need a cleaning. If it's not hot, then the webasto may not be running. Note, the Webasto will not run, IF the water in the system is already hot enough, like if you've been driving.

Ray

ps: I may be wrong, but the switches you're describing by your right leg are for the A/C system. I don't believe the heating blowers are affected by those. I don't remember any controls on the heat blowers. They didn't blow real hard, but if hot air is coming out, you don't need a ton of force.

[lloyd&pamela]

When the thermostat is turned up the Webasto does come on. I can hear it and feel the exhaust out the back.

What turns on the fans? The vent is located under the stovetop. Is the fan located there also or remote?

If the blower controls on the console are not for heat, are the ones located in the kitchen for heat and the ones on the console for cooling?

[JIM KELLER]

Lloyd, I have been reading this thread and I am sure you know this but still worth a mention. On our coach the thermostat has to be turned up like you are doing and the mode has to be set on furnace to allow the heater blower motors to run. The mode "heat pump" is for roof units only.

[lloyd&pamela]

Jim where do you set the mode?

[JIM KELLER]

On the thermostat itself. What is the year and who is the convertor of your Coach ? May not be like ours.

[JIM KELLER]

On the thermostat itself. What is the year and who is the convertor of your Coach ? May not be like ours.

O.K. I just found it. Not quite awake. Perhaps our thermostats are not the same.

[truk4u]

Lloyd,

There are coolant shut off valves on most of the buses. One is the flow to the heat source and one is the return. On your vintage I'm not sure if that loop is tied into the Webasco, but if it is, you may not be getting coolant to the heat exchangers if someone closed the valves. On my 97 Marathon, closing those valves stopped all coolant to the dash heater core, but I don't remember if the Webasco was in the same loop.

Jon?

[mike kerley]

Loyd,

The Bedroom and Living Rm blower (H M L) switches are for the chassis driven AC unit on our bus. They provide the air flow over the evaporator coils for CC version of over the road air. Central heat Control switch and Interior Heat Exchanger buttons on and thermostats set to above ambient temps will bring on a small flow of air over a heater coil under the sink area and in the front of the bus by the entrance door or in the bedroom. The only fan control we have is the thermostat. Fan comes on when heat is called for by the thermostat. Speed control not an option.

Kick heaters (electric ones) come on with the same thermostat, but have a different location and again, fan speed is not adjustable.

Mike K