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Is there a control or sensor for bunk AC 01 freightliner?

The bunk heater/ac unit is stuck in full hot all I see in the space is a electric valve inline to the heater core.. Also appears to have what I believe is blower resistor and possibly a temp sensor.. Has anyone dealt with this type of problem ? There is no door to switch hot to cold like on other units.

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The valve sounds like it's possibly stuck in the open position and will over power any A/C that's coming out of the bunk unit. I would advise that you go purchase two faucet type shutoff valves with the same pipe nipple size as your heater lines (usually 5/8) and install them where your heater lines run into the engine. You will be able to shut the valves during the summer time and never have to buy a electric shutoff valve again. Your truck dealer should have these valves in stock.

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