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Old 04-21-2014, 07:47 PM   #1
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Dash A/C - Is it really needed with dual roof A/Cs in a Class A

Mine dash air doesn't blow cold in my new '85 Vogue 33'. Mechanic says he can't put the old Freon in it to make it blow cold, and would have to install a new system at a cost of over $500-1000. I told him to not bother for I can't seem to understand when and why I would even need it. Can't imagine it cooling the whole coach, and assume the two roof airs would be much more useful in a really hot desert like situation.

What do you think?

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Old 04-21-2014, 07:55 PM   #2
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I use a "drop in" R12 replacement with good results in my '87. YRMV.

Don, Mary and Spooky
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Old 04-21-2014, 08:00 PM   #3
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Depends on when and where you drive I guess. You might need your defroster in some situations and, without your AC to pull the moisture out of the air, the defroster (heat) will just make things worse. Otherwise, you're right, you can probably do without by running your roof air / generator combo going down the road.
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Old 04-21-2014, 08:05 PM   #4
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My previous coach I had similar situation. Cost to fix the dash air was prohibitive and others feedback was it was not very effective anyway. So we just used the house air when needed.
Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.
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Old 04-21-2014, 08:07 PM   #5
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Here in the "Hot" zone, AZ,NM,TX. I need all I can get!
John and Susan. New 2018 Chevrolet 2500 2 WHD . 6.6 Duramax 3.73 rearend. .4 door ,Short, Bed W/Topper. 2017 Grand Design 297 RSTS. Our rescue dog Annie. Still ,Full timing since 07-01-2011. No sticks and bricks.
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Old 04-21-2014, 08:14 PM   #6
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That depends on how much heat the windshield is generating. If you have a lot of heat coming in off of the windshield, it is hard for an A/C behind you to keep the front of you comfortable.

Good point was made about the defrosters. Get into an area with a humid rain and you will need the defroster to work immediately.
Chuck in SW FL
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Old 04-21-2014, 09:23 PM   #7
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The 99 Discovery we had, the dash air did not work. Our current coach has a working dash air. 2 A/C's will keep the coach tolerable, but the cockpit area is still warm, especially with the sun beating through the windows. Find another mechanic, R12 is still available.
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Old 04-21-2014, 09:31 PM   #8
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I would recommend you take it to someone else, I have done lots of A/C service and there is another refrigerant called RedTec R12A that will work in all systems old & new that is environmentally safe. There was a time when R12 was banned and the only choice was to have your entire system upgraded ( big $ ) so you could use R134A but they developed RedTec and it solved that problem. As long as you don't have any leaks and all the components in the system are in good shape just have it recharged with RedTec and you will be chill'in! Of course if there is a problem with any of you components that would have to be repaired before recharging it. If you are handy you can buy a recharge kit at Wal Mart but you will need to know how much RedTec refrigerant your system holds so you know how much to buy.

Hope this helps!
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Old 04-21-2014, 10:27 PM   #9
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Had the same problem

My '98 Dutch Star had the same problem and we tried a trip using the two roof A/C's. It was around 90 degrees outside and the cab area was miserable. I spent about $800.00 to get the dash A/C fixed and now we can stay comfy at even 100 degrees outside without the roof units. (Unless we are driving into the late afternoon sun)

Our MH is a front diesel so maybe it is more efficient than a pusher. I've never had a pusher so I don't know for sure.
Lon and Martha Weekly
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Old 04-22-2014, 02:08 AM   #10
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I just spent 500.00 to get my dash air fixed on my newly purchased HR pusher. I was told by the seller that it didn't work and that he just used the roof airs. I told him I wanted 1000.00 off the purchase price after we had negotiated the sale. My reasoning is that I had to assume the worst and it could be $1000.00 to fix it and he had stated "everything works" at our initial meeting.
I drove it to Julian last week and that's pretty close to San Marcos.....you'll prolly wanna get the dash air fixed.
Kieth and Ellen 1998 Holiday Rambler Endeavor 34 wds.
Usually towing our Manx dune buggy along
Enjoying sunny spots in So Cal and the Southwest.
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Old 04-23-2014, 06:43 PM   #11
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We use the dash air more than the roof airs.
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Old 04-23-2014, 08:38 PM   #12
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My dash air was non functional when I bought my coach last year. Factored into the purchase price.

The ride home from CO to OH would have been very hot, had my roof units not been on. All that windshield glass sure can heat things up. I had to put down the cash to get the dash air working again.

I figured that the drive belt fouled up in the fan because about 15% of the blade surface area was gone. I needed a new fan, compressor, belt, tensioner, dryer, condensor fan, labor and recharge. Pretty much everything. A lot of cash to sort out. But, she blows ice cold now.
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Old 04-23-2014, 09:28 PM   #13
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Dash air is a luxury. For that matter so is roof air. I use dash air quite a bit when just driving around prior to my adventures... (hot weather but too lazy to fire up Gen to fire up roof airs.)

Dash air is a useful tool in the tool box but costly to get up to speed on older coaches. To get mine up to snuff... I had to buy new compressor and evaporator with conversion to newer coolant... but I use it and understand the value.
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Old 07-04-2014, 02:48 PM   #14
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In a statement above, it's all a matter of how valuable it is to you. I would not have the dash system inop in my coach. I would if I were you, shop around and find another A/C tech that will not take you to the bank on a conversion job. The drop in replacement for R-12 is new to me since I was taught there was no such thing when I went through HVAC Tech school. That may be an interim fix for you until you can get the system converted. I mention the conversion twice because for ease of mind and to increase the value of the system to you and if you should decide to trade or sell your coach. Just my 2cts, good luck....

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