jza800 Posted October 12, 2014 Share Posted October 12, 2014 i am goona need i Little help, i have changed my a/c pump as it was leaking.. i have seen on youtube.com that you can buy the r134a refrigerant in a can off 900 grams, but i need to get the pump to run before i can add the refrigerant in the a/c system... i now you would say go to the shop and let them fix it for me, but i want to do it my self, before i will go the the shop.. are there some inhere that have tried to recarge the system by them self??? so feel my to give me som guides ... Quote Link to comment Share on other sites More sharing options...
Ric Posted October 12, 2014 Share Posted October 12, 2014 Just get it done professionally, it's illegal to release those sorts of chemicals to Atmosphere probably just asking for trouble if you make a mistake Quote Link to comment Share on other sites More sharing options...
jza800 Posted October 12, 2014 Author Share Posted October 12, 2014 too late, the system is close to emty, as i have changed the a/c pump... so i need to charge it Again... Quote Link to comment Share on other sites More sharing options...
Nic Posted October 12, 2014 Share Posted October 12, 2014 (edited) I had mine done by a mobile AC professional the other week for £60, he first did a pressure test of the system, then cleaned out the system with a vacuum, then added a lubricant and finally filled with refrigerant. The whole process took around 40 minutes, it's a job you need a right equipment for, not something I would attempt without it. Have you fitted a new AC receiver drier? These should be replaced whenever the system is re-filled. Edited October 12, 2014 by Nic (see edit history) Quote Link to comment Share on other sites More sharing options...
Pipedreams Posted October 13, 2014 Share Posted October 13, 2014 Those cans are for topping up the system if it just leaked a small amount over time as it can do if not used for a while. If the system has been open to atmosphere it has to be vacumed to remove moisture and all air. Quote Link to comment Share on other sites More sharing options...
stevie_b Posted October 13, 2014 Share Posted October 13, 2014 Have you fitted a new AC receiver drier? These should be replaced whenever the system is re-filled. Interesting, I didn't know this. I've had my aircon topped up at least twice, and each time it's only lasted a few months max. What's thje symptoms of not changing the dryer? Quote Link to comment Share on other sites More sharing options...
mwilkinson Posted October 13, 2014 Share Posted October 13, 2014 The drier removes moisture from the system. If the system has been open to air at any point the receiver drier should be replaced; it's actually a service item. Ref recharging the system. Do these cans also contain pag oil? If not the system could run low on oil and seize the air con pump. Professional places measure oil content along with gas and refill both. For the sake of approx £50, I would take it to someone who knows what they are doing. Quote Link to comment Share on other sites More sharing options...
Nic Posted October 13, 2014 Share Posted October 13, 2014 I was told by the guy who did mine that the AC system should really be serviced every 2 years (new drier fitted, system cleaned, oiled and re-gassed), he said that very few ever do this and this is what causes the pumps to fail. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 13, 2014 Share Posted October 13, 2014 Propane makes a superb refrigerant, and is dirt cheap. But no doubt it's illegal as an accident will release highly flammable vapour that could easily ignite. I saw an Asian guy filling his private hire car's system with Propane the other day. Not good.... But apparently common. Quote Link to comment Share on other sites More sharing options...
Nic Posted October 13, 2014 Share Posted October 13, 2014 Denso make the AC components for Toyota, I recently replaced my condenser and receiver drier with Denso items from the US, they are identical to the OEM Toyota parts but a LOT cheaper, even when you factor in the postage to the UK.. Quote Link to comment Share on other sites More sharing options...
jonc Posted October 13, 2014 Share Posted October 13, 2014 I had mine done by a mobile AC professional the other week for £60, he first did a pressure test of the system, then cleaned out the system with a vacuum, then added a lubricant and finally filled with refrigerant. The whole process took around 40 minutes, it's a job you need a right equipment for, not something I would attempt without it. Have you fitted a new AC receiver drier? These should be replaced whenever the system is re-filled. This is the only way if your system has been emptied. Pressure test- to check integrity of system Vacuum-To get rid of all the moisture in your fridge circuit. Once a system is open to atmosphere there will be moisture in the system. This sounds yea yea yea but this can cause real problems and high pressures if not conducted properly boiling off all the moisture. Moisture=oxygen=high pressure and heat when compressed New Oil- Majority of Refrigerant oils are hygroscopic so they absorb moisture. New drier-Always a good idea if the circuit has been open and should be a service item for A/C. For qualified Refrigerant engineers it is illegal to fill a fridge circuit knowing it is leaking (not sure how Kwik fit etc get around it:taped:) Chris W is absolutely right Propane is used for absorption circuits. The Gas generators (powered by propane/kerosine etc) make ammonia but there are severe down sides to either system leaking :blink: Caravan fridges etc use this system as they don't use electricity. For £50-60 every couple of years its worth paying a professional:) Quote Link to comment Share on other sites More sharing options...
Mad Hatter Posted October 21, 2014 Share Posted October 21, 2014 Guys, I've just ordered a new condenser as I was told mine was leaking (lost all the gas from a recharge over 2 days) Toyota said the condenser comes with the AC receiver/canister and the pipework/bubble chamber ... should i order anything else now? thanks. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 21, 2014 Share Posted October 21, 2014 That should do it so long as there are no other leaks. You can chase your tail (expensively...) sorting old A/C systems out. If the evaporator is leaking, I'd fit a new heater matrix whilst all the dash is out, plus a new bypass valve or whatever it's called. I try to avoid A/C stuff as the bill can mount to am embarrassing level! Quote Link to comment Share on other sites More sharing options...
Mad Hatter Posted October 21, 2014 Share Posted October 21, 2014 Being a complete novice with air con systems I asked the garage to have a look some time ago, they came back with the condenser leaking and input pipe. Toyota say the ac pipe work is discontinued so they simply can't order it, i'm hoping that it may only be the condenser and the joint with the pipe ... it's original so i'm expecting a mucky job. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 21, 2014 Share Posted October 21, 2014 A good TIG welder, (better than me, probably), can sometimes effect a repair on leaking A/C aluminium alloy pipes and fittings, although there must be loads of cars with the A/C removed that might act as donors. Removing the pipework without damaging it is a bit of a fiddly job though. Quote Link to comment Share on other sites More sharing options...
Mad Hatter Posted October 21, 2014 Share Posted October 21, 2014 Yes I'm not looking forward to this one. Having just replaced the rad I really didn't want to get in there any time soon. I want to get a FMIC in as well so I expect I'll hold onto the parts until I get round to doing that and do the lot at once.... or throw the problem at a garage. Quote Link to comment Share on other sites More sharing options...
Nic Posted October 21, 2014 Share Posted October 21, 2014 Guys, I've just ordered a new condenser as I was told mine was leaking (lost all the gas from a recharge over 2 days) Toyota said the condenser comes with the AC receiver/canister and the pipework/bubble chamber ... should i order anything else now? I'm guessing this is what they have ordered for you? Provided the pump and evaporator are in good working order then it should be everything you'll need. Quote Link to comment Share on other sites More sharing options...
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