My AC System won't take Freon (97 Chevy K1500)

[GoToGuy]

Have tried any of the advice given , or are just trying random thoughts? Cause whatever methods your using don't work. Maybe your a take to the dealer kind of guy.

 

[Casey916]

I nedd some help I replaced everything and it held vacuum just fine for over 2 hours now after running the vehicle for about a week I'm hearing a hissing noise when I shut the truck off after running the ac.for awhile so I think i got a leaked at the orfice tune conection at the front of the vehicle ..or is it normal to have a hissing noise after system and vehicle shuts off.After using thr ac.for a.good hours while driving

 

[1998_K1500_Sub]

Are you turning the can upside down?

I wouldn't turn the can upside down, that'll put liquid into the suction side which may find it's way into the compressor in a liquid state... which can lead to compressor problems.

Get a pail of hot water and stick the can in the water, not submerged but deep enough to heat the refrigerant in the can and raise the pressure.

When I charge an empty system, I put liquid into the HP side while the system's still in vacuum. This method works well... and the compressor is off of course.

I'm hearing a hissing noise when I shut the truck off after running the ac.

This is typical.

 

[jasolhe]

Took it to a shop and their best electrical guy couldn't figure it out. Fried 3 very expensive AC Head units. Bought a wiring kit with a switch, jumped into the AC Compressor Relay, connected to battery, drilled hole through firewall, mounted on/off switch inside cab, works great.

 

[1998_K1500_Sub]

... Bought a wiring kit with a switch, jumped into the AC Compressor Relay, connected to battery, drilled hole through firewall, mounted on/off switch inside cab, works great.

Does the compressor still cycle like it should?

 

[Vikingdude]

Does the compressor cycle on and off, or does this unique solution leave it engaged all the time?

 

[GoToGuy]

That doesn't fix the problem. You side stepped it. After the second smoked unit. That told you there was a short .