The mobile car air conditioning service Diaries



Should I Flush or Install a Filter? [Idea from Underhood Service journal, Apr 2003] Condensers are trash collectors. Any debris that comes out from the compressor goes straight to the condenser. It's a low place inside the technique so debris and oil By natural means gather inside the condenser. However the debris would not keep place. Refrigerant flowing throughout the condenser can get particles and carry it into the orifice tube, expansion valve or again for the compressor. Debris can plug up the orifice tube or enlargement valve, creating a blockage and lack of cooling. These types of blockages also can stop the circulation of oil within the process, starving the compressor for lubrication. If your condenser is dirty, why not simply change it? That's what several experts advocate. But condensers are pricey to replace. The alternative is to scrub the condenser by having an accredited flushing chemical that hopefully will remove most or each of the contaminants.

Refrigerant results in Teflon to soften and fray and little items will break off to clog the growth gadget. The teflon tape can even buffer threaded connections to trigger bridging [a gap]over a o-ring fastener and other sorts of compression seals. All sealing is completed from the o-rings, not the threaded connections which happen to be only used to compress the o-rings. Really should I Make use of a Tracing UV Dye? Indeed. If the technique incorporates a leak, using a UV dye will allow your tech to trace it that rather more easily, especially the leaks which can be intermittent or hidden. See Resources above for just a source of UV lamps and detectors. If you do use a dye, add not more than one/4 ounce at a time and only 2 times. In excess of that will dilute your compressor oil. In case you inject a dye into an R134a program, be certain it satisfies the SAE J2297 common for refrigerant and oil compatibility. One dose of dye is more than enough. Adding extra pictures of dye not only will not enable, but simply because dye adjustments the viscosity with the oil, extreme use can adversely have an effect on compressor daily life.

[John Sargent] The two black and white Test valves are shown in the picture to the ideal. The car is usually a 1988 760T but most are similar. Just one hose is to the ACC, and the other is to the temperature sniffer inside the dome light (if so Outfitted).

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[Reaction: CW] When your water leak is on the correct facet then the shield in excess of the air ingestion for that heater enthusiast within the passenger's side may very well be unfastened. The defend is plastic and is also underneath the cowl before the windshield. In case the defend gets to be detached in the window edge, the drinking water operates appropriate from the windshield and in the ingestion, down on to the blower motor and afterwards on the ground.

Volvo retrofit kits incorporate a fresh receiver/dryer and O-rings (colour coded yellow) for your expansion valve, and also a new growth valve or orifice tube. Volvo states the technique ought to be evacuated for a minimum of fifty minutes subsequent recovery from the R-twelve and element alternative to tug out just as much residual R-12 as feasible. Volvo also says the shaft seals on Sanden 508 and 510 compressors ought to be replaced when changing to R-134a. The new seal is P/N 9134344-2. Should the compressor is becoming changed, it should be filled with POE oil throughout the fill plug only, by no means through the inlet or outlet ports. Also, Should the compressor is getting replaced, Volvo states not to incorporate oil on the receiver/dryer. [Editor] At conversion, take into account including equally a variable orifice tube and an in-line filter in the compressor suction line (both of those described beneath) on your technique to improve reduced-conclude cooling and guard the compressor from any process particles. Methods: Tips on how to retrofit R134 into R12 units. Dave Urban made a series of HTML internet pages demonstrating the Directions and illustrations for that Volvo retrofit kit for 7xx automobiles, including Dave's annotated comments from his possess changeover. These files are duplicated, with because of Dave, here: Illustrated R134 Retrofit Treatments for Volvo Cars and trucks by Dave City

If you experienced the method open, you have got to have it done by a store. The procedure should have all of the air and moisture evacuated just before it could be crammed thoroughly and the products to take action just isn't cheap.



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No. Incorporate 50 percent of a can of r-134a as detailed during the way described within the future methods. When the compressor however fails to have interaction, consider your car or truck to some mechanic.

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Clamp off reduce hose from valve to heater Main Clamp off lower hose in engine compartment then disconnect Position fabric on carpet to soak up spilled coolant Eliminate decrease hose within vehicle connected to valve

Installing a larger or more productive condenser could also support compensate for losses in cooling efficiency with R-134a. If the original condenser or evaporator is currently being changed thanks to a leak, damage or defect, ensure the replacement device has precisely the same or superior BTU rating. Some aftermarket substitution condensers and evaporators might not deliver exactly the same cooling efficiency, and produce a dilemma your client did not have in advance of.

It is form of the Don Foster strategy, in his circumstance replacing the heater motor on 240s. There are 3 motors and fortunately probably the most available is normally the culprit and has two hose connections. To start with try a Mighty Vac and hook up a tube to each with the connections and find out should they hold a vac. If one particular would not, there is a undesirable vacuum motor. Have to disconnect the hoses around the motor initial, certainly. Do your diagnostics first. [Reaction: Abe Crombie] To broaden on what Dick posted: The very likely perpetrator, assuming the vacuum source is coming in the right way with the engine compartment, is the ground/defrost servo. It is a double acting (no vac centered= ground/defrost split, vac on blue hose = defrost, vac on yellow hose = ground) and it has a boot on the floor side that retains vac on that side of diaphragm. The boot fails and you simply reduce vac. Blocking yellow hose fixes it simply with compromised ground air quantity (ground could be floor/defrost). All of this aforementioned things is usually the situation if symptom is loss on acceleration. [Editor] A fresh vacuum servo costs around $sixty if you select to switch it. 740 or 760: Ideas. The 760 with ACC has An electrical vacuum valve set to remaining at the rear of glove box and a cold soldered joint on it at among the end pins will induce no response in any placement which defaults to ground/defrost. The 740 with MCC provides a rotary vacuum switch linked to slide lever for vent collection along with the hoses behind panel (white is source) may be crushed or perhaps the feed hose (white) over accelerator pedal at firewall is usually crushed. The 760T with ECC features a flooring/defrost servo sprung to return to Heart when no vac is used. This tends to immediate air achieving this A part of the air distribution housing towards the defrost and to the floor outlets. The yellow hose applies vacuum to the side of diaphragm that may prolong the servo rod to push the doorway up blocking many of the defrost vent air and directing 90% +/- to flooring. The seal that rides the servo rod can dislodge or just split and you have the result you noticed: air stops popping out of any vents through turbo boost (manifold strain as opposed to vacuum), indicating a leaky press-pull vacuum servo. Disconnecting the yellow hose will likely not permit you to get complete ground air. When the floor air place is chosen (by you or via the ECC logic) the air will be break up involving floor and defrost. This is probably going not a challenge Unless of course you have really weak leg circulation that provides you a intense tendency to cold feet long soon after the rest of Your entire body is here warm. The logic in the ECC constantly has the ground placement picked on this servo when it's directing air on the sprint encounter vents so if it leaks you shed the vac for entire program and the many doorways go

The moment You begin the engine, suction from the compressor will suck a 3rd can. That is certainly 36 ounces in lieu of the 32 ounces identified as for your A/C to the 960. That works for me, but I bear in mind Tom Irwin recommends a small food stuff scale to put in exactly 32 ounces of R134. If You need to alter the condenser, I discovered the immediate match aftermarket a person from FCPGroton has the edge more than the condenser which was in the car (Volvo?) of no steel plates from the aluminum. Usually, that aftermarket condenser is a little bit shorter leading to bottom in comparison to the one that was in the car, with round rather than flat tubing. I are not able to compare capacity (BTU) in between the two condensers, but to date that aftermarket device offers me 32-34 levels Farenheit air within the vents within the tropics! Valuable Air Conditioning Sections, Products and solutions and Resources. AScanTech (Avantia) direct in good shape aftermarket condenser is $175 from fcpgroton plus a Volvo a single is $439 from Swedish Engineering. A fresh (not remanufactured) Sanden SD7H15 compressor is $320 from FCPGroton. Locally, I was quoted $995 (yes, $995) sight unseen so I don't know whether or not it was new or remanufactured. An accumulator will cost you $50 from FCPGroton and maybe a few pounds extra from Swedish Engineering. A Mastercool flush gun is $forty three and flushing solvent is $twenty a bottle from You will require shop air to employ Those people. The Airsept kit with "Compressor Guard" screens to maintain debris during the program from getting into your new compressor costs $67 from . For leak detection, get an Airmax LED penlight for UV leak detection from (costs about $forty) and also a list of UV-improving glasses from JC Whitney for approximately $five. You should purchase air conditioning dye injectors from NAPA. The glasses are important to see the dye. To seal pipe joints with o-rings, get some Nylog, which happens to be appropriate Along with the o-ring material and stops corrosion.

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