A/C guage reading...I cant

[HoustonR6ryda]

My nieghbor had a guage set. My a/c is out in my 2000 GMC. I put a jumper wire in the relay to get the compressor going. Thanks for any input.

[fowlwaters]

You should be reading the 134a numbers which are the blue number scale.

[Rather_B_Fishin]

I would say your really low of freon cause your suction and head press are so low. There is prob a safety switch that protects your compressor if you can get it to come on my a jumper wire. Didn't work on car A/C in school much.

[mossyoak20]

yes compressors have a thermal switch and a pressure release valve. are those readings with the ac on or off?

[HoustonR6ryda]

that was quick.... fowlwaters I knew I'm running R134a(sticker on fan shroud).
RatherBFishin I had a jumper on to get that readund pictured-thanks. I found some numbers online that say my compressor may be done. Any other comments highly appreciated.

[HoustonR6ryda]

fan on blast- windows down-jumper wire in relay,compressor engaged( thanks mossyoak20)

[Rather_B_Fishin]

Make sure you turn it on max with the fan all the way on high. I wouldn't thank it's fried if you can get it to come on with the wire. Might have to replace a relay and add freon to it.

[mossyoak20]

either low charge or faulty compressor........mechanic for a living

[Team me]

Bleed your hose after hooking a can up and
Add some If it comes on with the jumper on the low pressure switch it's not fried.

[HoustonR6ryda]

Thanks

I kinda figured it was time so I bought this rebuilt set off ebay came prefilled with PAG for $175.now I just need time and a flush kit and a vacuum pump.Its gettin hot outside. Thanks all who commented and any other thoughts appreciated.

[HoustonR6ryda]

might try it before tear down Team me