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Old 08-13-2022, 09:56 AM   #1
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2000 Monaco Dynasty38 ft diesel Dash AC not cold

Can we charge it ourselves with the canisters like you buy for car dash AC? If so what kind to use for Motorhome dash?
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Old 08-13-2022, 10:04 AM   #2
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There should be a sticker some where.

I used the R134, when I first bought my Windsor the air wasn't cold. I added one can and that fixed it for ~10 years. Last year I bought a set of gauges so I could watch the pressures. Added some freon and it started working great.
Some people go through the whole system, but if only leads down over a period of years adding is probably the cheapest option. If after adding and it goes down after a short period of time you may have to tear into it further.
Jim J
2002 Monaco Windsor 38 PKD Cummins ISC 350 8.3L
2005 Jeep Grand Cherokee w/5.7 Hemi
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Old 08-13-2022, 10:24 AM   #3
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Thank you. Weíll try it. Just 1 can?
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Old 08-13-2022, 08:29 PM   #4
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You can find a lot of threads on dash AC as well as temp/pressure charts. If static pressure is below 20psi I would say you need to vac it down and test for bleed down time then weighed charge added.
Also those adjustable temp/pressure gauges on cheap R134A charge can adapters will put you over charge if you follow it, on system with TXV expansion valve. You need to go by chart , temp and proper rpms. if adding a can or two.
You can find guys that do HVAC on the side to vac and weigh a charge. You would need to make sure you have proper air flow across condenser and right rpms to set it right.
95 Monaco Crown Royale
M11 400hp, 4060 trans.
Aquahot, Generac Guardian7.5k
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Old 08-14-2022, 06:41 PM   #5
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I used this to recharge my AC system

Here's a previous thread which will give you some good info
Vera & Ken
1998 Holiday Rambler Imperial, RR8S Chassis
Cummins 6C8.3 mechanical engine, 325HP, 3060 Allison
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dash, diesel, monaco, monaco dynasty

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