Heater always hot, even when it's on cold?
#1
Heater always hot, even when it's on cold?
Mk4.5 smiley face
You get the engine up to operating temps and then all you get is hot air through the vents, even when the dial is turned to cold
It psychically stops when it turns at either end so I'm not sure if the cable has come off or not, but sometimes it totally cold before getting blisteringly hot again
It's got ac if that makes a difference
Any pointers?
You get the engine up to operating temps and then all you get is hot air through the vents, even when the dial is turned to cold
It psychically stops when it turns at either end so I'm not sure if the cable has come off or not, but sometimes it totally cold before getting blisteringly hot again
It's got ac if that makes a difference
Any pointers?
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#8
PassionFord Post Whore!!
These are controlled by a PWM circuit, there is no cable to regulate the temperature.
Easy way to test that the control circuit is working -
Get a 12v 5w bulb and couple bits of wire (I use an old mk4 Escort side repeater bulb/holder)
Disconnect heater control valve connector and connect the bulb to it.
With engine running, and heater hot/cold in varied positions the bulb will either
Stay off in one position
Be on all the time in the opposite position.
In the middle position it will flash about once a second.
http://www.fordpartsuk.com/shop/ford..._valve_531.htm
Easy way to test that the control circuit is working -
Get a 12v 5w bulb and couple bits of wire (I use an old mk4 Escort side repeater bulb/holder)
Disconnect heater control valve connector and connect the bulb to it.
With engine running, and heater hot/cold in varied positions the bulb will either
Stay off in one position
Be on all the time in the opposite position.
In the middle position it will flash about once a second.
http://www.fordpartsuk.com/shop/ford..._valve_531.htm
Last edited by GVK.; 05-12-2011 at 06:12 PM.
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