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Dash Air Help – Greensboro, NC
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My vent temp is now down to 47 degrees but i am still unable to find the leak, only place left will probly be the lines that run ft to rear they look like they go down passangers side center from tire well behind bumper and there is some kind of control valve in tire bay roof on the high pressure line what the heck is it for?? My gauges are reading 30 123 and go a little lower every few days.
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David,
On the following page you can access a lot of information on your coach and specifically the AC system. When I am being driven crazy trying to figure stuff out I start there and then expand my search to the various manuals including the suppliers manuals.
On AC system leaks, especially one going down relatively fast I look for the wet spots. Actually not wet, but signs of dirty or oily stains from the refrigerant oil being carried out of the system with the gas. If it is clean and dry the chances are the leak is elsewhere. My #1 source of a leak has been the seal at the compressor followed by loose fittings, always accompanied by dirty black grease.
http://prevostparts.volvo.com/technicalpublications/en/manuel.asp
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The control valve is probably the blend valve that adds hot
coolant to the evaporator if you turn up the temperature switch such
as when the AC is too cold for your better half. That valve can also
give you trouble when it’s not working properly by allowing hot
coolant into the system when you don’t want it. In other words,
sometimes it won’t completely shut off. For that reason, I always
turn off the coolant lines in the summer to the dash loop. -
I think David is talking about a refrigerant valve.
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Tom,
I’ve never heard of a blend valve, so this may be my learn something new today accomplishment. I thought increasing the temperature was nothing more than opening the heating control valve and running some hot coolant through an independent of the AC evaporator heat exchanger.
I too close the heating valves at the engine that supply hot coolant to dash heat.
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Call it what you want.
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this elect valve was in the small ac line the hot one it was in the tire compartment on the roof of it ill get a picture on here soon have any one had a freon leak in the lines from engine compartment to tire well behind bumper i can’t find were lines are hidden
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Would that valve be the expansion valve?
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