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Old 01-20-2015, 02:18 PM   #1
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Heater

IRV2 does not allow old threads to be used to add commentary. Here is my question to the referenced thread:

2003 Alpine Coach dash heater core removal?

Thought I would bring this thread back up for another question. My dash heater no longer puts out hot air, so I assume the motor/water valve assembly needs to be replaced (4100663 Acme Water Valve Assembly on the referenced web site). Once again the nuts are not easily available on the inside. I am thinking I will just cut off the bolt heads and use wood screws to reinstall.

I am also thinking about just replacing the core at the same time. In looking at the hoses, they are reasonable flexible at the front of the coach, so I am thinking I may just replace sections at the engine, which I assume are brittle. Seems pretty difficult to run new hose from front to back. Anyone done this?
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Old 01-20-2015, 03:00 PM   #2
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Spent a bit more time and it turns out that the carpet by the throttle can be moved out of the way by taking out a few screws. The nuts are visible.
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Retired in Apple Valley, California
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Old 01-25-2015, 06:40 PM   #3
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Just an update. I removed the heater control bracket by removing the nuts from the inside as I described above. Turns out I did not have to do that. The motor/valve assembly is held on to the bracket by two 1/4 inch screws. I need to order parts and then will get back on this in a couple of weeks. Going to be gone in the MH for a while.....without a dash heater. Considering just going ahead and replacing the heater core while I am in this mode.
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Old 01-25-2015, 09:37 PM   #4
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You can order the Heater Control Valve from Thermotion , the Part Number should be, 354-69464.
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Old 01-26-2015, 08:40 AM   #5
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Dave, that link doesn't seem to work for me. This one does ...

Thermotion Store. Electronic Coolant Control Valve
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Old 01-26-2015, 12:35 PM   #6
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Thanks. I already placed an order with the referenced supplier. I decided to also replace the heater core.
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