Questioni got a 1999 ford winstar the heat is working in the back but not the front whats rong with it
AnswerWe are based in the uk and have no specialised knowledge of your vehicle.
Only one component in the a/c system would prevent the system working in the front compartment.
Beyond there it will be something to do with the controls or flap movement behind the dasboard.
If you have a separate rear a/c system and not one that justs ducts air from the front, you will have two expansion valves. These regulate the flow of refrigerant around the system. If the front one has stopped working then the cool chamber ( evaporator) will not function properly and the vents at the front will not blow any refrigerated air.
This is difficult to diagnose on the gauges, if you have a separate rear system the rear expansion valve appears to be working. Under these circumstances the gauge readings are likely to appear correct.
The only clue would be if you are able to touch the a/c pipes as the enter the vehicle under the bonnet.
With the engine and a/c running, and taking the greatest of care to secure all loose clothing before leaning across the engine,
feel the temperature of both pipes, if they are both ambient then this could indicate valve failure.
Beyond there I will need more information from you.
Let me know how you get on, in the meantime it would be useful to know whether you have two expansion valves, is the system fully charged with no leaks, and do you have full climate control or manual a/c ?
Thank you
