BAC Forum

General Boards => Technical Support => Topic started by: Tom Csibor on February 14, 2023, 01:02:57 AM

Title: Front dash heater/ac control
Post by: Tom Csibor on February 14, 2023, 01:02:57 AM

My fans no longer turn on for the dash heat/ac. Neither driver fan or passenger fan.

In looking at the electrical bay, I cannot find a connection for 12v power to the control, nor can I find if a relay is part of that circuit.
The circuit breaker
/ relay map only shows 10 of the relays, when in fact there are another 11 relays not shown.

Does anyone have advice and schematics to show the wiring to the control unit?

Title: Re: Front dash heater/ac control
Post by: Fred Brooks on February 14, 2023, 02:13:10 AM

    Tom,
The 8th circuit breaker down on the left row in the front electrical compartment is the Dash air conditioner. It is a 30 amp auto reset circuit breaker, It controls both dash blowers, condenser fan and the compressor. If the blower fans are old and noisy, the amp draw will exceed the 30 amp rating. The schematic is in coach electrical for 2000 Marquis in "Coach assist"
    Fred

Title: Re: Front dash heater/ac control
Post by: Steve Huber on February 14, 2023, 02:37:53 AM

Tom,
In case it's not the breaker, Coach Assist has a schematic of the Acme Dash Heat/AC control used in your coach. It's under Heating and AC Systems.
Steve

Title: Re: Front dash heater/ac control
Post by: Tom Csibor on February 14, 2023, 07:00:32 PM

Thank you both for your replies. I'll be darned if can find the Coach Assist files.  I'm logged in and went to the Technical Forum and still cannot find it. 😑

Title: Re: Front dash heater/ac control
Post by: Eric Maclean Co-Admin on February 14, 2023, 07:09:17 PM

Tom
On the top of this page you will see a blue link to the right click on that link then click on the technical drop down from that drop down menu pick coach assist.

Title: Re: Front dash heater/ac control
Post by: Tom Csibor on February 14, 2023, 07:33:40 PM

Found it.  Thank you.