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Heater controls


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haphazard
User

Aug 10, 2021, 9:05 AM

Post #1 of 10 (329 views)
Heater controls Sign In

09 town & county
212,000 miles

3.8 motor
My rear heater control isn’t working
I replaced the whole unit and still don’t work
Can someone tell me where the relay fuse is located ?
It worked for a minute then stopped I’m thinking it could be a bad fuse or relay
Thanks


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 10, 2021, 9:45 AM

Post #2 of 10 (322 views)
Re: Heater controls Sign In

What specifically isn't working?

Does it work from the front control?



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



haphazard
User

Aug 10, 2021, 11:04 AM

Post #3 of 10 (316 views)
Re: Heater controls Sign In

The front controls work fine, if the rear control that don’t work, blower motor isn’t working on any setting


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 10, 2021, 11:09 AM

Post #4 of 10 (312 views)
Re: Heater controls Sign In

Maybe you didn't understand my question.

Can you control the rear blower from the front control?



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



haphazard
User

Aug 10, 2021, 11:24 AM

Post #5 of 10 (305 views)
Re: Heater controls Sign In

Yes, but there is a 2nd countrol for the rear, it’s below the front controls


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 10, 2021, 11:28 AM

Post #6 of 10 (303 views)
Re: Heater controls Sign In

The rear control uses it's own module and sounds like where the problem is. The switch is built into it.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



(This post was edited by Hammer Time on Aug 10, 2021, 11:29 AM)


haphazard
User

Aug 10, 2021, 11:34 AM

Post #7 of 10 (294 views)
Re: Heater controls Sign In

Is there a separate fuse or relay for it ?
How do I go about fixing it ?
I replaced the whole unit with another one and it worked for a minute, then stopped
The whole heater controls, front and back sre on the same unit


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 10, 2021, 11:42 AM

Post #8 of 10 (288 views)
Re: Heater controls Sign In

Yes, there is a relay and a fuse in the main power module under the hood.


Here is the wiring diagram






~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



haphazard
User

Aug 10, 2021, 11:53 AM

Post #9 of 10 (280 views)
Re: Heater controls Sign In

Is there a number for it in the fuse box ?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 10, 2021, 11:59 AM

Post #10 of 10 (278 views)
Re: Heater controls Sign In

The diagram gives you that info. It's fuse #J18 30A



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.







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