[Reaction] Vacuum to shut the h2o valve is barely applied in max AC mode or once the MCC temperature selector is thoroughly cold. This varies according to the style of control technique in the vehicle (MCC, ACC, ECC) and the Volvo OEM service handbook really should be consulted for specifics of vacuum signals.<br><br>Clamp off reduced hose from valve to heater core  Clamp off reduce hose in engine compartment then disconnect  Place cloth on carpet to soak up spilled coolant  Get rid of lessen hose within motor vehicle connected to valve<br><br>[Editor] There's on my 95 940 a significant strain a/c hose from the compressor for the condenser. Under the RF bumper, the hose terminates within an aluminum tube right before connecting With all the condenser. This tube is secured on the underbody which has a vinyl-coated steel clip, which in my circumstance rusted and wore throughout the aluminum tube producing a lack of R134. The hose assembly is expensive, so Verify the bracket and ensure It isn't destroying your a/c hose/tube as a result of corrosion.  Really should I Utilize a Sealer? Within a word, no. There are two types of sealers: stop-leak for perforation leaks and seal sweller for leaking O-rings and O-ring form gaskets. They're normally merged in only one product. Whilst the primary will seal pinhole corrosion leaks, it will not seal the rest and since it really works by reacting with moisture, it could clog up your system. The second can distort o-rings.  Should really I exploit Teflon Tape on Connections? Will not use Teflon tape.<br><br>You will find the OT in that joint. The earlier vehicles (with incredibly little diameter pipes in the firewall) experienced it from the evaporator. The growth tube place began in 1991, I believe, but that's not a confirmed model 12 months for that transform. Like a 1993 model, your car is bound to hold the OT inside the enlargement tube.    R134 as opposed to Refrigerant Options.<br><br>Your firewall-aspect heater water valve was set up backwards; The arrow within the valve points to towards the firewall inlet, not back toward the motor.<br><br>Really don't Allow it remain on recirc eternally as this can lead to a Substantially enhanced probability of a/c odors. Change it off recirc during the night or when the temp receives again to standard (if it at any time does in TX)<br><br>[Herb Goltz] In 740 automobiles, eliminate the connector within the lower pressure turn on the accumulator/dryer (the aluminum cylinder on the firewall). Jumper across the two terminals inside the connector (a paperclip works high-quality). With all the AC set to on as well as the engine jogging, the compressor must interact Should the terminal Within the connector is receiving +12V electrical power by means of the 10-next delay relay guiding the glove box.<br><br>[Inquiry] My 960's a/c compressor cuts off during metropolis driving when accelerating. When coasting or within the highway just protecting pace, the a/c performs fantastic.<br><br>A filthy filter will decelerate air stream and make the procedure function more difficult to keep you warm or interesting &#8212; throwing away energy. A clean up filter will also stop dust and Grime from build up from the program &#8212; resulting in high priced routine maintenance and/or early system failure.<br><br>This will allow you to join the first harness plug to the motor without the need of hacking nearly anything. Make sure the polarity is accurate on set up so it does not operate backwards. This is actually the exact blower as used in any 'ninety one-'96 rear wheel travel total dimensions Typical Motors motor vehicle. Notice that post-1990 autos use another plastic mounting plate. <a href="waiting for link from Web 2.0 Blogs (5)">useful link</a>