Hi,
I am in a couple of weeks going to change out my accumulator and orifice tubes when they arrive - my question is I am changing over to r134a how easy is it to adjust the cycling switch on the accumulator ?

thanks in advance
jon

Easiest way is to buy a switch already calibrated for R-134A, otherwise hook up a gauge set and see where it cycles, and turn the screw between the terminals until it kicks on at 21 psi.

The pre-adjusted switch for R-134A is Four Seasons Part # 36674

Thank You
jon

I have a new cycle switch, same number. If I remove my old switch, am I going to loose my refrigerant? I don't want to have a blowout and evacuate all the oil when I remove the old one. If need, I can slowly discharge the system through the low side schrader valve without losing oil.

[This message has been edited by fierofool (edited 02-20-2014).]

There's a schrader valve under the switch. As long as the person who last worked on it didn't remove the schrader valve and then install the switch, and charge the system, you should be fine. Be warned, they can be easily overtightened and crack when reinstalling.

Thank you for confirming that for me. I just went out to swap out the switches and I found that Factory Air part number 36674 isn't the correct switch for the Fiero. The Fiero harness will not plug onto this switch. The original Fiero switch has it's two male terminals exposed while the Factory Air switch has it's male terminals recessed inside the insulator.

If you've used this switch without modifications to your harness, could you provide a picture? The one I have looks exactly like the online image on their website.

Pull the round insulator off - it just keeps the terminals from getting bent in shipping

Thank you. I was just about to head back to the parts house to return it.