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Are you going to change the electric hot water valve? Or just clamp it off when it’s hot out. Kinda got the same problem with the hot water still heating up my heater core while the A/C is on. Read somewhere that these valves don’t work that great and hot water still gets through. I...

I looked at the water valve today looks like it’s working. Although the heater core still gets pretty hot.

I’ll put some more R134A in. Got a new toggle switch today from Advanced Auto parts. It is pretty close to what was in there without spending $100 on an exact new one.

Also the heater core is really hot in the front Evap assembly. I think the water valve is stuck open. Tried to clamp it off with some vise grips but it still seemed hot . Probably didn’t clamp good enough. Is the valve held closed when the power to the A/C is on? Seems strange And one last...

Ok got a new multimeter. What a difference. The A/C switch on the dash appears to not work. Jumped 435A to 435E and bypassed the switch. Got power all the way to the low pressure switch. Nothing past it. Jumped it and every thing turned on. So it looks like the A/C switch is bad and possible...

This was from the other day when I got the compressor to turn on for a second.

What I’m trying to do is follow the origin of the power and see where it goes. If I find something that appears to not work I would bypass it. I got the clutch to engage and compressor to work for a short time by bypassing all of it by running a wire from batter to it. It turned on without any...

When I connect it to the - buss and + buss in the battery box I get 190.00ish this is set on DCV 200. When set on DCV 20 the numbers go up and then get a number 1 as a it’s over the limit of what it can read. I get the moving from 20 to 200 just moves the decimal. The tester some times not...

Thinking my cheap multimeter is not working right. The thing is all over the place. I tried the low speed on the fan kinda got the same results as before. I plugged in the water valve (435B) and lose power to the (435D) . Seems like the water heater valve is connected in some sort of way...

Awesome info! I’ll give that a try. Thanks for all the help!

The high and low fan speed work. I also have power to the right rear cond. fan if unplugged from dryer and jumped together.

Tested some more wires today. Not sure how many volts I’m suppose to get but figured 24v. Got around 14+ until I got to front Evan temp switch. Got nothing on the 438 wire on other side. By passed it and then got nothing on the other side of the low pressure switch 436C. I notice I wouldn’t get...

Thank you!

Also noticed the heater core attached to blower/ac unit was hot. Was running it on AC high fan?

So I attempted to put some r134a in but it did nothing. Nothing kicked on. Tried jumping the wires between both low and high pressure switches nothing. Followed wires to see where they went and connections. So I found a wired connector that’s capped off. Looks correct? Picture attached. what I...

Do you think those measurements are low causing it to not engage the compressor or do I have a compressor problem.

This one might be a random fix. I just took my truck for a drive…..been fixing and painting it for some time. Went down the street and the cab filled with exhaust/smoke. Well upon further inspection I found that the vent/pipe that crosses over the engine was gone/ never there since I got it. So...

Haha figured I had it backwards. Any chance you have a similar reading on the gauges when off? I think I might go and put some R134A in and see what happens.

Smaller connection/blue side is high pressure and bigger connection/red side is low pressure side. And again these are readings when the truck is off.

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