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Old 09-23-2015, 01:43 PM   #1
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Need Dometic 2607 Tech Advice

If this has been covered previously please direct me as my search was fruitless.

We recently purchased a '94 Flair with a non-functioning refrigerator. The upper circuit board seems to function normally and the gas/110 does what it is supposed to-sort of. At least it comes on when it should, but it fails to cool properly. I replaced the thermistor with one of the "clip tip" models with no improvement. After reading some troubleshooting info on the web I connected the 110 element directly to 110 which, as I understand it, would bypass the circuitry and determine if the cooling unit was functioning properly. This morning the freezer temp was below 0 degrees F. It looks like the cooling unit is OK? Is it time to replace the lower board or time to do some more diagnostics to be certain? At this point I'm all out of ideas, but I would like to be certain that it is indeed the lower circuit board before replacing it. The original board appears to have been replaced at some point in time with a 1997 Dinosaur P7001129 model.

Thanks,

Steve
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Old 09-23-2015, 06:03 PM   #2
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Try to find a manual here

http://dometicmanuals.com/PROD/MASTE...f?Opendatabase

Parts here
https://edometic.com/allusr/sp.nsf/spcr?ReadForm

I would not run the refrigerator long on direct 120V to the heaters, the safeties for overheat etc are bypassed.
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Old 10-25-2015, 11:47 PM   #3
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Thanks for the links and advice. Sorry for taking so long to get back, but I've been sidetracked from the refrigerator and am now starting to replace with new parts everything from the water pump out, including it, belts, hoses, fan clutch, and re-cored radiator. I never want to go back in there again. Also converting from R12 to R134a with new a/c compressor and receiver drier. As soon as this is finished I'll get back to the fridge.

I've heard rumors this will be fun someday ;-))

Actually we've had two diesel truck/11.5 camper combos, the first one in 1978 and the replacement in 1993 with at least 4 or 5 hundred k miles back and forth across the US and to Alaska, and we know from that it IS fun. We're looking forward to getting the old MH on the road.

Thanks again,

Steve
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Old 10-26-2015, 08:41 AM   #4
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Replace all rubber hoses and seals as the r134 can see through the hoses for r12.

R134 hose has a liner.
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Old 10-27-2015, 01:14 PM   #5
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Thanks for the A/C hose advice.

While what you are saying is correct because of differences in the molecular structure of R12 and R134a, at least from what I've read, I've decided to use the old hoses and replace only the disturbed O rings. My decision is based primarily on the cost of new hose VS the cost of replacing a little R134a occasionally. Also with consideration given to the relatively easy access of this A/C system if leakage becomes significant and hose/seal replacement is necessary.

I did convert my older Dodge Cummins to R134a several years ago replacing only the disturbed seals, compressor, receiver drier, and expansion valve. I have been satisfied with it so far.

While my actual experience is limited to the above activities, my consensus from the many hours of reading and talking to others about the many A/C questions I've had is that the hose leakage problem has not actually been as significant as it was at first thought it would be with the introduction of R134a. However, there is no doubt that the new hoses should reduce whatever amount of leakage there is.

I am willing and ready to be corrected. Please feel free to do so.

Thanks again,

Steve
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Old 10-27-2015, 04:16 PM   #6
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Search Youtube for I think Fred Smith refrig... very good info.
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Old 10-27-2015, 07:58 PM   #7
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Depending on cost...

35 pounds of r134 is from 60 to 90 bucks at sams when they have it and not restricted.

Got ours for 35 then a week later found one along the highway.

Did not change hoses as did not know then but considering the on hand supply we fill it each year in the jeep.

In the coach we use hot shot as direct replacement and with hoses going to both ends with an ac at each end way too much hose so we just top it off as needed.
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Old 10-28-2015, 12:08 AM   #8
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Thanks Rugrider, I think I did read some of their info on the internet while I was actively trying to troubleshoot the fridge before going off on my current repair tangent. I will probably return there as soon as the "vehicle" part of this thing is done, perhaps sooner. At this time it is far from being level as as the front is currently up on jack stands with the wheels off checking bearings, brakes, etc. Then to the rear.

TQ60, Have you checked other places for leaks in the Jeep A/C? I don't replace that much in the truck and I am pretty certain it also has a slight leak at the receiver drier, which is another story. I think I read somewhere that the lubricants required for R134a may have had something to do with the lower than expected leakage from the R12 hoses. Since our MH only has hoses in the front they may not be that expensive to replace, I didn't actually check that cost for it, I simply used the results from the truck as a guide thinking I could replace hoses later if leakage was significant.

Thanks again,

Steve
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