This machine has 2 pressure transducers one for the low side and one for accumulator. When I switch the connectors between the 2 the error changes to accumulator pressure error so to me that tells me the low pressure one is bad. If I leave the connections disconnected I get no error. The bigger problem is why it’s venting refrigerant. I suppose I could pay the diagnostic fee and see what I am looking at. Just afraid even if I get it fixed then something else goes wrong. I guess I could buy that one like mine and keep this one for parts.
Sent from my iPhone > On Apr 5, 2022, at 8:42 PM, Allan Streib via Mercedes <mercedes@okiebenz.com> > wrote: > > If it were me and I trusted the shop I would probably pay the $180 for the > diagnostic. Once you know what's wrong, you can decide whether to have them > repair it, do it yourself, or replace it. > > Otherwise it's a careful, deliberate process of testing and elimination to > figure out what is wrong and repair it. What is your time worth? > > >> On Tue, Apr 5, 2022, at 9:24 PM, Kaleb Striplin via Mercedes wrote: >> I have a Robinair 34788 fully automatic machine that I have had for >> about 4 or so years now. Nearest I can tell it is probably 10-15 years >> old, not sure. Per the menu look like it has has around 2600 lbs ran >> thru it. Not sure if that is a lot or not for these machines. Anyway, >> last year it got to where it was throwing a low pressure error when you >> turn it on, then gives an oil drain error when doing a recovery. >> Several times it has ended up venting all of its stored R134 thru the >> vacuum vent line into the oil drain bottle. I also suspect the ball >> valves on top of the internal tank are leaking. I am betting the low >> pressure error is the low pressure transducer. I also tested the >> solenoids and they all appear to work so I am thinking the oil drain >> error could be the circuit board. When it is supposed to be doing an oil >> drain it never even opens the solenoid. >> >> Called a local service place for these and if they come here its $250 >> for the drive plus $180 for the diagnostic, or I can take it to Tulsa >> and just pay the $180, then pay whatever labor for the repairs plus >> parts. Assuming it needs all 3 ball valves those are around $60 each. >> The transducer is around $150 to $180 depending on the website. Circuit >> board is about $350. So if it actually needs all this I would probably >> be looking at a grand to fix this machine. That does not factor in any >> additional labor. >> >> I would always just order the transducer and see if that fixes the rest >> of the problems (which I am not hopeful of), or pay the $180 to see what >> is wrong and what it would cost to fix it. I am however considering >> just buying a newer machine. There is one exactly like mine but appears >> to have been used a lot less and includes a 30lb cylinder: >> >> https://www.facebook.com/marketplace/item/5143233472435476/?ref=search&referral_code=marketplace_search&referral_story_type=post&tracking=browse_serp%3Adc0e9849-915e-40a4-b3d5-28817f9adfa7 >> >> Also looking at these: >> >> https://www.facebook.com/marketplace/item/965256667454473?ref=search&referral_code=marketplace_search&referral_story_type=post&tracking=browse_serp%3Adc0e9849-915e-40a4-b3d5-28817f9adfa7 >> >> https://www.facebook.com/marketplace/item/274691608128011?ref=search&referral_code=marketplace_search&referral_story_type=post&tracking=browse_serp%3Adc0e9849-915e-40a4-b3d5-28817f9adfa7 >> >> https://www.facebook.com/marketplace/item/698606498164730/?ref=saved&referral_code=null >> >> I know these are a lot of money but I actually do quite a bit of AC work >> for my own fleet of cars and projects. Anybody have any thoughts on >> fixing mine or spending the money on a newer one? >> >> _______________________________________ >> http://www.okiebenz.com >> >> To search list archives http://www.okiebenz.com/archive/ >> >> To Unsubscribe or change delivery options go to: >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
