Quote:
Originally Posted by Kahoona
Hi
Here is the problem: There is no drop in air temp at the dash vents in our 2002 Coachmen Mirada. The clutch on the compressor does not engage. One day I went to drive it and there was no cooling. It had sat for only a month or two. ........................
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I Know this was posted long ago.... But, I found it with a google search, as my '99 Chieftain (Ford V10) dash A/C wasn't working, nor was the fan switch.
I actually tried a few things myself (low pressure switch as example) and noticed that I also had a bad vacuum tube to the 'ball' under the dash on the firewall. Fixed those issues or so I thought, and still "no workie".
I hired a Ford Tech who became a mobile mechanic. Took advantage of him, as he came to diagnose not only the RV... but, my work truck ('06 F350) and my '05 Excursion. All of them had some oddities when it came to the A/C working as it should.
On the RV, he found;
- two bad vacuum lines. The one at the ball on the firewall. And another down behind the gas pedal.
- a bad thermostat switch. This is the one you referred to in a post with pictures located on the firewall passenger side. Part #A46-3122-030. I have one on order from eBay.
- a Dash Blower Motor Resistor 035-00006. It's located on the interior below the passenger dash. I ordered one from
https://pdxrvwholesale.com/
I wanted to thank you for the pictures, and for explaining your own troubleshooting. It helped me... so, I made sure to come on here and see if I could help the next guy/gal.
My A/C fan switch didn't work on the dash climate controls, nor would the dash vents blow (it was stuck on defrost). And, the A/C's compressor clutch wouldn't kick on. The tech, also evacuated and refilled the freon to manufacturer's spec (part of his diagnosis).
I do need to ask him if he cleaned the orifice tube filter thing... I see that it was pretty clogged on the other two vehicles. One had metal/alum all over it. So I ordered new parts to replace (compressor, condenser, accumulator) on that vehicle (which only has 37k miles!).
Have a good day!!