Question about 1988 Ford Econoline
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Posted on Jan 02, 2017
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My sincere apologies for the delayed response.
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Again my apologies...
Posted on Mar 06, 2010
the a-c and heater run on 2 different systems the heater needs coolant going thru the heater core to make heat by blowing air through it and the a-c uses it's own sealed system to cool the air so if you have no heat / it has nothing to do with the a-c working or not . first thing you do is check the cooling system like rad and coolant levels . you will have heater core hoses running from the engine to the firewall going to the heatercore . grab the heater core hose and feel if it's hot . if your hoses are hot then the heater core is bad or the blending doors are stuck .
Posted on Jan 22, 2010
Heat and a/c is controlled by a vacuum servo on the rear heater box. if vacuum is lost then the servo defaults to heat. I recomment removing the rear left quarter trim to access the vacuum servo(servo cylindrical and a little smaller than 1/2 soup can, it has a flat metal rod sticking out). Use a vacuum pump to test the servo and see if it moves and holds vacuum. If it doesn't work them replace it. If it does work then test to see if there is vacuum at the hose that attaches to the servo (with engine running try test in both a/c and heat modes) it should have vacuum in a/c mode. If no vacuum is present then you will have to trace the vacuum line back to the heater contol head looking for splits or cracks. At the heat control head you can test to see if vacuum comes from the control head or not. I suggested starting in the rear because servo failure is rather common since it is only used seasonally.
I hope this helped. This is all based on a ford factory system. Your vehicle description says "cutaway" so if it has the ford rear system this will work. If it is not a ford system then I would need more info as to what kind of system it is.
Posted on Apr 04, 2010
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