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06-04-2010, 09:01 PM
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#1
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Junior Member
Join Date: Apr 2010
Location: Las Vegas, NV
Posts: 13
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Coleman Mark 3 A/C Problem
Hey All,
My 1986 Coleman Mark 3 TSR A/C just stopped working today. I can hear the compressor coming on but the fan doesn't blow and just buzzes/hums, so I turn off immediately. Do I need a new fan motor? Bearings? Thanks for your help!
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InTheDogHouse
1987 Ford Econoline 350
6.9L Diesel N/A "C" Class
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06-04-2010, 09:31 PM
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#2
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Moderator Emeritus
Ford Super Duty Owner
Join Date: Aug 2000
Location: Bryan, TX when not traveling.
Posts: 22,948
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Get up on top and remove the cover. See if you can freely turn the fan. If it is stiff, you need a new fan motor. If it spins easily, give the fan a hard spin, get your hands out of the way and have someone inside turn on the unit. If it runs now, you need a start capacitor.
The unit is 24 years old and not worth spending much money on it.
Ken
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Amateur Radio Operator (KE5DFR)|No Longer Full-Time! - 2023 Cougar 22MLS toted by 2022 F150, 3.5L EcoBoost Tow Max FX4 Lariat Travel with one Standard Schnauzer and one small Timneh African Gray Parrot, retired mechanical engineer
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06-04-2010, 10:50 PM
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#3
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Junior Member
Join Date: Apr 2010
Location: Las Vegas, NV
Posts: 13
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Only thing is that it uses old R34 which, I understand, works much better than the new stuff. What do you think???
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InTheDogHouse
1987 Ford Econoline 350
6.9L Diesel N/A "C" Class
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06-05-2010, 08:12 AM
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#4
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Moderator Emeritus
Ford Super Duty Owner
Join Date: Aug 2000
Location: Bryan, TX when not traveling.
Posts: 22,948
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The old roof top units use R22. Effective 2010, no new equipment is to be manufactured for use with R22. It will be available as a service refrigerant until 2020.
R-134A is used in automotive A/C units and replaced R-12.
There are a number of R4XX series that are being used for R22 replacements. I am not sure if the new production units have a 400 series or R-134A.
Ken
__________________
Amateur Radio Operator (KE5DFR)|No Longer Full-Time! - 2023 Cougar 22MLS toted by 2022 F150, 3.5L EcoBoost Tow Max FX4 Lariat Travel with one Standard Schnauzer and one small Timneh African Gray Parrot, retired mechanical engineer
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06-05-2010, 08:39 AM
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#5
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Junior Member
Join Date: Apr 2010
Location: Las Vegas, NV
Posts: 13
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Wow, thanks Ken. Gonna go out this morning, remove the cover, etc. and see if the fan spins. If not, new unit here I come!
__________________
InTheDogHouse
1987 Ford Econoline 350
6.9L Diesel N/A "C" Class
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06-05-2010, 09:15 AM
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#6
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Junior Member
Join Date: Apr 2010
Location: Las Vegas, NV
Posts: 13
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Well, the fan spins just fine on it's own, but still makes a humming noise and won't run when I turn it on. Will try to prop start it (clear!) as soon as the wife gets up. Sounds like I might need a new start capacitor? Where is that bugger located anyway? Underneath the motor? Thanks again for any/all help.
__________________
InTheDogHouse
1987 Ford Econoline 350
6.9L Diesel N/A "C" Class
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06-06-2010, 07:46 PM
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#7
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Junior Member
Join Date: Apr 2010
Location: Las Vegas, NV
Posts: 13
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Update: Tried spinning the motor when turned on and it didn't speed up. In fact, as it slowed down it started to SMOKE. Well, either a new motor for an old unit or a NEW UNIT period. I vote for a NEW UNIT! Thanks for your advice and if anyone needs parts for an old Coleman Mark III TSR 13,500 unit . . . .
__________________
InTheDogHouse
1987 Ford Econoline 350
6.9L Diesel N/A "C" Class
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