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Old 08-18-2012, 05:47 PM   #1
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AC issue and related

'02 Discovery that the dash air sometimes blows cold and sometimes blows room temperature. I'm thinking it is an issue with the thermal xpansion valve but not sure where it is located. It appears to be behind the dash. Now the problem: how does the dash come apart to get to the rascal (if that is where it is at)?

It would be simple if the panels under the dash that have carpet and vinyl on them would come off but try as I might I can't figure how they are attached and even if this is the right approach.

Can anyone shed some light on this?

Thanks,
Jim
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Old 08-22-2012, 03:29 PM   #2
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If it helps anyone just got the mh back from the local shop to check out the ac issue.

I had tried adding refrigerant to the ac but was not able to get it to take any. The shop found out it was 2# low with a charge spec of 3.8#. Apparently the unit was freezing up although I'm not sure I completely buy into that. They cleaned the condensor, added 2# and it is blowing cold as of now. They drove it for a 20 mile trip and had no issues with it.

We will be taking it out in the next couple of weeks on a much longer trip and will see how it goes.

I did ask why I wasn't able to get it to take any freon and they said that sometimes the charge line you get with the kit (from walmart, O'reillys, auto zone) does not depress the schaffer valve in the line far enough to let the refrigerant in. Sounds plausible.
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Old 08-29-2012, 10:25 PM   #3
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he was correct on cheapy charge fittings...they won't push far enough to open the schrader valves.

Low by 2# ..I doubt it was freezing....R134a systems are VERY finicky to having the EXACT proper charge...just a few ounces too much or too little will render the AC unsatisfactory
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Old 08-30-2012, 02:30 AM   #4
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Next time you want to gain access to the front hvac, First remove the lower curved panel, the one with ultraleather and a band of carpet. This comes off by first removing the switch panel with the four rocker switches (carfully as not to break any) the panel is held by just three screws two are buried in the carpet sripe at the bottom, just feel for the heads and the third is on the top just under the curved dash by the steps. work the panel out by wiggleing and pulling and yes the wood trim by throttle will stay. On the lower part of the panel is a vent for the heater, just disconnect the duct after removal. Under the panel you will find the hvac unit and a mess of wiring. you will also find a bundle of relays just laying there!!! these are for many systems so I tucked mine in a place I can get to and not interfere with the throttle. I had to change my heater core twice and if you need more, just ask
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Old 08-31-2012, 05:12 PM   #5
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Thanks Dave. Very good information. I did notice that the switch panel has been cracked from the previous owner, or someone, messing with it.

Before I take it off I'll see if Fleetwood has a replacement for it.

Jim
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Old 09-02-2012, 01:43 AM   #6
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Jim the switch panel is actually four switches put together. You can order just the one that is cracked by left end, middle, or right end and what the label says. I made a replacement panel out of modellers ply and lighted toggles, works much better and easyer to throw the switches. Toggles are available at ace hdware. If you find another switch wire bundle behind the panel, just disreguard as I did.
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