Hi PA Honda,

Just checked for continuity between pins 1 & 4 and nothing. No continuity.

So compressor won't run, all fuses and relays are good. Guessing the coolant pressure is too low for the compressor to kick in or perhaps there's a problem with the clutch. There's probably a leak somewhere which caused the low pressure and that's why there's no continuity in pins 1/4 of the pressure switch. Working backwards, I need to find the leak if there is one, but can't find the leak unless there's pressure in the system and I can't pressurize the system if the compressor won't run. The chicken and the egg thing right. Thanks for your help!

 

Do you know what your pressures are currently

 

Try adding a little more refrigerant before you give up. Adding trough the low side takes a little while. Just set the system to max cooling and add a little bit, then a bit more, see if you can get the compressor to kick in. It will not actuate when the pressure is too low.

 

Hey 13jeeps,

thanks for the information. I just got a set of gauges and will hook them up this weekend to see what the pressures are. I'm guessing they'll be pretty low. Just wondering how to go about adding refrigerant a little at a time? I tried to add some a few weeks back and I didn't pull the trigger on the refrigerant can for more than a second and the gauge said full. So thinking I'll be able to give it a quick shot, then wait for the pressure to come down, then give it another shot and so on? Eventually if I build up enough pressure the compressor will kick in, assuming it's not shot. Let me know what you think. Thanks!

 

Hook up your manifold and post a pic of the readings. The gauges are a way to troubleshoot the system also.

 

Hey Sean, I'll do that, thanks

 

Hey Sean, here's the photo of the gauges.

 

You are definitely low. If you have the means put a vac on the system do it. If not fill and see what you get. If you have someone else to help, while filling have them rev the engine to 3k rpm. I don't know if you're using the manifold to fill or not but it would be the best way to do it

 

Just reread the thread. You said that you had the system charged a year ago and now all the R-134a has leaked out. Did the shop tell you the location of the leak? Did they put dye into your system when the recharged last year?

This is an opportunity to fix the leak, properly charge the a/c system, and have the a/c last for years. If the shop didn't have add dye, you can get a can of R-134a with dye in it. Charge or partially charge the system then look for the dye. A UV light helps. The alternative is to follow the a/c lines an look for signs of oil/dirt on any connection. The R-134a is a gas, but the PAG oil in the system doesn't evaporate and will attract dust. You may have a bad o-ring or maybe a schrader valve that needs replaced and both are simple repairs.

 

Hey Sean, no vac pump, but I'll try fill it and engage the compressor and see what happens. Thanks