I have a 2003 Itasca 27 class A that has a rear heater under the bed. I'm trying to figure out how this thing works (it does work when driving). It has electrical wires running in to it and seems to have water lines (from the hot water heater?) going in as well. Does the hot water heater provide the warmth or what? Thanks.

The Chassis engine supplies the heat thru the coolant lines. Depending on the Model number of your water heater, the same coolant lines may also heat your water heater in transit also. If you give me the Model number of the water heater, I can answer that question. Doug

Wish I had this on my rig. Heats just like you dash heat. Had it on my Winne gaser but not on the Winne DP. Oh Well.

I'm assuming it's like my 1999 Itasca. It's connected to your engine cooling system. Mine also heats the water heater. The wiring is for a blower to force the heat out. You should have a switch on your dash that will open the valve to it and turn on the blower. Although we have never used the rear heater it's great to have hot water available on the road and when you first set up camp.Dave

You say it works like the dash heater, meaning hot radiator water flows through a heat exchanger at the rear of the coach? And it will also heat up water in the hot water tank, when turned on?

murraymcleod wrote:You say it works like the dash heater, meaning hot radiator water flows through a heat exchanger at the rear of the coach? And it will also heat up water in the hot water tank, when turned on?Yes. You have second heater core under your bed. Be sure to check the lines, which run all the way back from the engine, and maintain them on a regular basis. You also have "Motor Aid" hot water heating which routes engine cooling water to a heat exchanger around your water heater. See Sections 2-11 and 8-8.2003 Itasca Sunova Owner's ManualLook here for all of the manuals and diagrams that are available to you from Winnebago. Winnebago Industries Manuals and Diagrams

Itasca 2003 rear heater? | Good Sam Community

murraymcleod
Explorer
Mar 06, 2016
You say it works like the dash heater, meaning hot radiator water flows through a heat exchanger at the rear of the coach? And it will also heat up water in the hot water tank, when turned on?
dbates
Explorer
Mar 06, 2016
I'm assuming it's like my 1999 Itasca. It's connected to your engine cooling system. Mine also heats the water heater. The wiring is for a blower to force the heat out. You should have a switch on your dash that will open the valve to it and turn on the blower. Although we have never used the rear heater it's great to have hot water available on the road and when you first set up camp.

Dave
GPWayne
Explorer
Mar 06, 2016
Wish I had this on my rig. Heats just like you dash heat. Had it on my Winne gaser but not on the Winne DP. Oh Well.
dougrainer
Nomad
Mar 06, 2016
The Chassis engine supplies the heat thru the coolant lines. Depending on the Model number of your water heater, the same coolant lines may also heat your water heater in transit also. If you give me the Model number of the water heater, I can answer that question. Doug

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Itasca 2003 rear heater?

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