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Old 08-28-2015, 07:35 AM   #1
Join Date: Feb 2015
Posts: 20
Year: 81
Chassis: Crown Supercoach
Engine: 885 Cummins Turbo (A-855t-11)
81 crown. How do I turn off rear heater. Soon hot!

So there is a radiant heater heated by coolant lines and forced with a fan in the rear. The fan is never on but the heater still gets hot as **** because the coolant is running through. I see a large bolt looking thing I line before the heater. Does this thing need to be turned just 90 degrees like a ball valve to stop the flow or does it need to be screwed In or out to stop it? I can't imagine I would have to reroute the lines to stop flow as it gets really hot back there and no one would make something that stayed on constantly like that

Heater model is a bergstrom
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Old 08-28-2015, 09:15 AM   #2
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Posts: 4,075
Post a picture. Usually there is a valve coming from the engine. Sometimes it is near the engine, sometimes inside.
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Old 08-28-2015, 09:15 AM   #3
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Join Date: Mar 2011
Location: Houston, Texas
Posts: 4,350
Year: 1946
Coachwork: Chevrolet/Wayne
Chassis: 1- 1/2 ton
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The rear heater on my old Bird had a fluid bypass/shutoff valve that would simply cut of the flow to that unit. Look underneath along the may or may not have one but worth a peek.
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Old 08-28-2015, 09:17 AM   #4
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Join Date: Nov 2011
Location: Sault Ste. Marie, Ontario
Posts: 1,122
Year: 1997
Coachwork: Thomas
Chassis: B3800 Short bus
Engine: T444E
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Yeh, I would look in the engine bay for some standard water valves inline with the smaller coolant lines. All buses that I've dealt with have them.
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