95 Integra, no a/c, good system pressure a/c off, no pressure when compressor on (engaged).?

Is the compressor bad, or is there a blockage. If a blockage, usual place (part to replace or how to locate). Is heater core suspect?

95 Integra, no a/c, good system pressure a/c off, no pressure when compressor on (engaged).?
Maybe the R134 needs to be recycled.
Reply:Heater core different part of system, - just in same box!





Now with a set of gauges on (hi%26amp;low sides both)-- if you have a plugged system, - it will get very high on hi side, and probably pull down to a vaccuum (or near) on low side, -- as freon is not circulating! I don't work on Integras.- but a/c systems wortk pretty much the same! I am assuning that it has a "critical charge system"-- which is the cheapest system to install (and most expensive to maintain)! The 'critical" part is that it will not work if 1/2# to low, or 1/2# too high "charge"!! It has a "filter screen" in line from pressure side of compressor (smaller hose line) - in this "filter screen is a small brass pellet, with a "calibrated hole" in it! If the screen %26amp; hole is plugged off - no freon can circulate! And the circulating ("makes cold")-through this "pellet",-- is controlled by in-out pressures (this is what makes it "critical!'). If plugged, you have to remove freon, and open system, "fish" the screen/pellet out and clean out! Check and see if it is just "junk from system,-- or dessicant bag as broken and circulating material from accumulator through system,- (dessicant in bags inside accucmulator)l So it could be amount of freon in system that makes it "short cycle" -- which is on and off about every 5 seconds! The closer it is to 60 seconds (running)- the cooler the air will be inside! With plugged line, - it may "short cycle", or posibly will shut off compressor all together,- depending if it has a "low pressure cutout" and where (this is added expense, so some don't use it)!





Now about the heater, -- the evaporator and heater sit about side by side, -- and there is a 'door" that closes over one so that the other will work! When over the heater, air comes out through a/c evaporator!, - when over a/c-it comes out through heater! If door not closing over heater, the a/c might be trying to work, but air can't blow through it! ---- In which case the a/c compressor is running reasonably long between cycles, - and the top of accunulator bottle gets really cold --(the big aluminum "can")- standing vertical right by "heater box"- on engine side of firewall!- If door not working it is probably a vaccuum supply problem and you will have to hunt for leaks from supply side-- through firewall-- to control switch and then check all the "servos, and see if they are working to shift doors in "heater plenum"!