Pressure Switch in A/C circuit

Joined: 06 Jan 2003 Location: Vancouver

Hey all,

Does anybody know where the pressure switch for my a/c circuit is physically located? (If it has one, I am pretty sure it will)

I cannot find it!!

Car is a diesel 4runner, 12/85.

Stew

Posted: Fri Nov 28, 2003 3:30 pm

It is located in the black evaporator box behind the glove box under the dash. You can remove the glovebox to get at the box, there will be a 2 prong lead that plugs into the switch to check for continuity, you can't get to the switch physically without evacuating the A/C system and removing the evap box. What seems to be your problem? A/C not coming on?

Joined: 06 Jan 2003 Location: Vancouver

Thanks Troy!! I will check it out. Laughing

The air con doesn't come on, but I think it does not have enough gas in it.

The air con has never worked since I had the car.

I am actually beginning to make plans to implement onboard air using the a/c pump. I was going to use the dashboard a/c light to activate it, with the air tank located at the rear of the car, near a quarter panel I think at this stage. Might be too far a way, not sure. I was going to keep the a/c lines and condensor for more air volume as well.

There are no leaks in the system (yet), and the pump does work.

Stew

Posted: Tue Dec 02, 2003 8:21 am

The low pressure switch will stop the compressor from engaging if there is insufficient gas in the system - to prevent damage to the overall system. You will have to rewire the system to bypass the low pressure switch and the fan override if you wish to use the dash A/C button for compressor engagement.

A regas is pretty cheap anyway if you were thinking of keeping the A/C.

Joined: 06 Jan 2003 Location: Vancouver

A/C would be good....... But onboard air would be as well.....

hmmmm, decisions, decisions........

Thanks Troy for the info Laughing

Stew

Posted: Wed Dec 03, 2003 3:21 pm

As much as I would like onboard air, I would not part with my A/C. Prolly sounds like a weak excuse to have A/C, but with $12K of camera gear on board, I'm not fond of a lot of dust in the cab, so it's windows up and blowin' cubes...

Been down the road of onboard air, now thinking blue tongue (continually rated) and big tank. Not running air tools, just for trail inflation.

Joined: 06 Jan 2003 Location: Vancouver

I have gone without air con for ages, and although Its good (Needed in the NT in all Dads pootrols) It seems fairly easy to implement onboard air. I was actually going to set it up for air tools, blower, and tyre inflation.

But air con is good.......

Might have to look more into the costs. I have seen air con regas's on the old system for $68, but also the parts needed for onboard air around $40 or so depending on what the wreckers can provide at the time.

Stew