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Old 11-12-2010, 01:51 PM   #1
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Question Chassis heating problem

Hey, I'm new to this forum and have a problem that I have not seen listed.

I have a 98 Holiday Rambler Endevor with a Cumming 5.9 engine. The chassis heat does not work. I checked the hoses running form the radiator and they are not hot.

Does anyone have any ideas?
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Old 11-12-2010, 05:32 PM   #2
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On my earlier B5.9 motor one of the heater hoses went to a fitting on top of the motor close to the fan. This fitting had a valve on it that would shut off the heater system. Check rhat valve and see if it is open. Also check on where the other hoses comes into the motor and see if there is a valve on that also. There is also a heater valve to control the amount of heat in the front of the MH up above the generator against the firewall.
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Old 11-12-2010, 05:54 PM   #3
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Thanks Mike

I will check for these valves.

Thanks,
Tim
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Old 11-12-2010, 10:23 PM   #4
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One thing about diesel pushers, don't expect too much out of the dash heat or air. One simple thing that will help somewhat, get a shower curtain rod and clear plastic shower curtain and hang it up behind the cockpit, remember-unlike a car, you are trying to heat or cool a small house behind you as you go down the road.
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Old 11-15-2010, 06:01 PM   #5
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chassie heat problem

I understand that it is hard to heat such a large area with the dash heat but there is no heat at all coming out.

I checked for valves and only found one attached to the line underneath the engine and it is open. I also checked the valve that controls the temp attached to the firewall and it is working.

Does anyone know the location of any other valve?

Thanks so much for any help you can give me.

Tim
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Old 11-15-2010, 06:25 PM   #6
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Did you find the other heater hose on top of the engine that goes into the fitting on the head? If so then follow that hose out of the head and see if you find the other valve. Most of the time there are two valves so you can isolate the heater from the motor. The worst situation here is that the heater core is blocked internally. Since there is a valve on one heater hose you can shut off that one and undo that hose and undo the higher hose on top of the motor and attach it to a garden hose to one of the hoses and use high pressure water to blow out the heater core but lets don't go there yet.
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Old 11-16-2010, 09:34 PM   #7
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If your coach has the "motor aid" system for using engine coolant to heat the water heater contents, this will reduce heat output at the dash heater. Most have valves to turn off the motor aid system.

I too have limited heat from the dash heater, so it is a common problem.

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Old 11-18-2010, 06:07 PM   #8
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Smile chassie heat problem

I found the other valve Mike. It was attached to the head right in back of the engine and was turned off. It was kind of hard to see. I though I looked everywhere.

I have not had a chance to test it yet but I'm sure it will do the trick. I'll let you know if it doesn't.

Thanks a lot.

Tim
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Old 11-18-2010, 06:23 PM   #9
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Tim, I bet that is it. When you say the back of the engine are you saying at the transmission end or close to the radiator. Mine was at the end closest to the radiator but it could have also been put at the transmission end. My recommendation is to turn that back off again in the summertime so your AC is colder. Also watch for a leak in the heater system because you don't know if it was turned off to make the AC work better or because there was a leak. Good going.
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Old 11-19-2010, 06:02 PM   #10
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chassis heating problem

It was at the back over the transmission.

I tested it today and it works.

I'll make sure to cutt it off for the summar.

Thanks again.

Tim
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