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Heater running all the time

Tiny
JAMBO
  • MEMBER
  • 2005 FORD MONDEO
  • 80,000 MILES
2005 ford mondeo 2.0 diesel
the interior heater comes on full blast once I turn the ignition key twice(before turning engine over)and I can not switch it off or turn it down. As the heater buttons are not lit or working. Even when I start the engine it is the same.
hope you can help
thankyou
regards
jamie
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Saturday, January 14th, 2012 AT 9:52 PM

7 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Inspect the blower motor relay-could be sticking
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Saturday, January 14th, 2012 AT 11:05 PM
Tiny
JAMBO
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  • 5 POSTS
Thankyou for your reply.
I have the relay out and at first glance it looks fine.
I guess it could be sticking.
I am at present, trying to trace one down to see if it will fix the problem. If the change does not have any effect, should I then check the heater blower ressister?
Thanks very much
jamie
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Sunday, January 15th, 2012 AT 6:26 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the blower switch this one feeds power to the resistor
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Sunday, January 15th, 2012 AT 6:34 PM
Tiny
JAMBO
  • MEMBER
  • 5 POSTS
Hi and thanks.
Do you know where that switch is located?
I will investigate aswell
many thanks
jamie
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Sunday, January 15th, 2012 AT 7:38 PM
Tiny
JAMBO
  • MEMBER
  • 5 POSTS
Is that the heater on button controlls on dashboard?
I am having one of them doppey moments :(
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Sunday, January 15th, 2012 AT 7:48 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Where you turn On the AC and Heater
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Sunday, January 15th, 2012 AT 11:20 PM
Tiny
JAMBO
  • MEMBER
  • 5 POSTS
Hi there my friend.
I received my new heater switch today, and just
Finished fitting it. The heating is back to it's
Happy self. Fantastic
The old switch had green fluffy stuff on and around
The circuit board and connectors.
Do you know why that happened?
Anyway I want to thank you for the spot on
Info that you gave me.
Thanks to you I resolve the problem quickly
And cheaply.
I am most grateful
Best regards
Jamie
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Thursday, January 19th, 2012 AT 9:02 PM

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