peter richards Posted July 14, 2018 Share Posted July 14, 2018 just had the ac re gassed on the old mans car , nice and cold after the job , but within twi days it was blowing warm , so took it back thinking there was a leak , fella put it back on the machine and it was full no leaks , so any idea why its not cold in the cabin , compressor is kicking in fan is working Quote Link to comment Share on other sites More sharing options...
evinX Posted July 14, 2018 Share Posted July 14, 2018 Leaking condenser. Check the undertray for green oil. If its using r1234yf the pressure tests arnt strong enough to test. The real test is when the system is powered on by the car itself. Quote Link to comment Share on other sites More sharing options...
peter richards Posted July 14, 2018 Author Share Posted July 14, 2018 no leaks he checked the system again , Quote Link to comment Share on other sites More sharing options...
rider Posted July 14, 2018 Share Posted July 14, 2018 You really need to know the pressures in the system when it is running compared to standing. If its holding around 60psi at standing then thats a good indication you have a good charge in the system. When the compressor kicks in the LP side should drop to around 14psi and the HP side should be running around 160psi (it does ambient fluctuate). If you aren't reaching the HP side pressure you have a knackered compressor and that will be your problem if the system is correctly charged (you can overcharge as much as you can undercharge an a/c system). If all your pressures are good then it's likely to be your temperature sensors that are not reading as they should. Quote Link to comment Share on other sites More sharing options...
rider Posted July 14, 2018 Share Posted July 14, 2018 Here is a pressure chart for R134a https://i.stack.imgur.com/SBEAL.jpg Quote Link to comment Share on other sites More sharing options...
peter richards Posted July 14, 2018 Author Share Posted July 14, 2018 ok im away for a few days ill have to see what its like when I get back , then if its the same book it in for a full check Quote Link to comment Share on other sites More sharing options...
peter richards Posted July 14, 2018 Author Share Posted July 14, 2018 he re did the re gassing took about an hour same as Wednesday , and it was cold again when I left Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted July 14, 2018 Share Posted July 14, 2018 What car is it? Quote Link to comment Share on other sites More sharing options...
peter richards Posted July 14, 2018 Author Share Posted July 14, 2018 ford grand c max Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted July 15, 2018 Share Posted July 15, 2018 I had a problem on a Mondeo, the fan wasn't kicking in so the system over pressurised and wouldn't work. Changed the fan module (common prob apparently) and that cured it Quote Link to comment Share on other sites More sharing options...
Samurai 20V Posted July 15, 2018 Share Posted July 15, 2018 Check the expansion valve, if that fails, it doesnt allow gas into the evaporator, so no cold air into the cabin. Quote Link to comment Share on other sites More sharing options...
peter richards Posted July 15, 2018 Author Share Posted July 15, 2018 ok thanks guys , fan is working , just seems strange as after he did the second re gas it was cold again , same as the first time in the week , im away now for a few days to wont be able to check it on it Quote Link to comment Share on other sites More sharing options...
peter richards Posted July 29, 2018 Author Share Posted July 29, 2018 just a quick update , again its not cold , so its booked in to a specialist tomorrow , trouble is they could say its anything there arnt many places to take it here so hopefully ill get a decent diagnosis , cost of the check is 37 quid , so fingers crossed its not to expensive to fix , if it is then the old man will probably just leave it Quote Link to comment Share on other sites More sharing options...
peter richards Posted July 30, 2018 Author Share Posted July 30, 2018 (edited) ever had the feeling your about to be ripped off , left the car at the garage , two hours later we get a call , all done apparently the system wasn't 100% full up so they extracted it and re gassed it £78, ok we thought not bad , now when we get there we are told a completely different story , this time the condensers gone , and that they never re gased it the lady was wrong to tell us that , new bill £400, when I asked him about the condenser he showed me it through the front grill and 80% of the fins had gone , now had he just poked them out I don't know , especially as he said hed not seen one of these with low miles in thart condition , so what do I think , I think hes messed with the condenser and the girl almost dropped him in shite . anyway being a greedy git hes priced himself out of any repair that we will do , ill look to see how much the condensers are and go from there. ps ill go back to ATS tomorrow and tell him what he said , im sure if the condenser was gone he wouldn't of tried to re gas it twice Edited July 30, 2018 by peter richards (see edit history) Quote Link to comment Share on other sites More sharing options...
evinX Posted July 30, 2018 Share Posted July 30, 2018 Leaking condenser. Check the undertray for green oil. If its using r1234yf the pressure tests arnt strong enough to test. The real test is when the system is powered on by the car itself. I wont say i told you so. Very common to be fair, all it takes in a stone to jump up and hit it. My mums hyundai dealer was quoting 350 for a condenser, got a blue print jobbie for 65 of ebay and its held cold ever since. Quote Link to comment Share on other sites More sharing options...
peter richards Posted July 30, 2018 Author Share Posted July 30, 2018 no not at all mate , just the two different stories puzzled us today , ill see what the fella says at ATS tomorrow , because when I took it back after the first re gas , youd think he would of noticed the condenser in that condition. one thing the fella said today when I asked him about the leak he said its only small although most of the fins have gone , and it wouldn't of showed in the test Quote Link to comment Share on other sites More sharing options...
peter richards Posted July 30, 2018 Author Share Posted July 30, 2018 did you fit it mate or a garage Quote Link to comment Share on other sites More sharing options...
evinX Posted July 30, 2018 Share Posted July 30, 2018 Family mechanic came and took it away to fit as with the hyundai the whole front end has to be stripped, checkout ebay seller - cooling solutions - they may have the one you need Quote Link to comment Share on other sites More sharing options...
peter richards Posted July 30, 2018 Author Share Posted July 30, 2018 ok will do , thanks for the advice Quote Link to comment Share on other sites More sharing options...
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