All I could do is throw parts at it. Fingers crossed.

 

I guess I don't understand this. How does the AC system over work the compressor? The compressor is centralized heart of the AC system. I don't understand what it means to have a wrong signal or a bad signal. A compressor clutch is basically an electromagnet it's either on or off. I understand that the compressor could be over-pumping the system and be bad. But I don't understand how that relates to the overheating problem. Are they saying your condenser pressures are so high that it's getting too hot resulting in the overheat?

 

I don't really understand it either, but his opinion was that it was likely that it was causing excessive heat in the system. If the pressure is too high in the system or too low, I can imagine that affects the heat transfer of the freon related to outside temperature. Maybe one of the temp sensors is malfunctioning. I'm no HVAC tech, but I would think that that would affect the system adversely.

Also, it was not a hard code, and he did not go into detail on what the info he got from the scanner was. It was not coming up on the Ultragauge, but I don't know what tests they ran or what a professional scanner is capable of.

I will get the details, when they figure it out.

 

He fixed it. There was a short circuit, and his English is good, but he is busy so a detailed explanation wasn't possible. The A/C fan was not operating properly either. There was a short in the system.

It is now running fine, and will not get hot. I wish I had a better explanation, but he said there was a short.

 

I gotta say I am shocked, but temps on the way home in traffic and highway were 188-195, mostly 190. The wiring from the fuse box to dash and to a/c fan was bad.

I will put the Flex-a-lite back on and see what happens.

 

Oh so condenser fan not working right? That makes sense then.

 

To some extent, but it was working. From listening to how it is running I would guess it was at 75%, it is much louder, and seems to be spinning faster, but was working.

There is no way that that fan makes a 30 degree difference. I think it was a confluence of the whole system not working properly.

 

I came across these fan controllers and they look awesome. The Flex-a-Lite one is chinsy. They recommended the fk45 or fk75 for the GTO fan.

http://dccontrol.com/relay_controllers.htm

Alex have you seen this controller for the Taurus Fan? It would be able to support two speeds:

http://dccontrol.com/2sp.pdf

 

What a difference.

I put the flex a lite 15" back on. The ambient temp is 77 degrees and enough to have had the temp spike previously.

In traffic, temps were 193 to occasional 195. The fan comes on at 193 due to the controller. So comparable to the HD fan from Autozone the last couple of days, albeit it is cooler today, but not cold. The A/C cranked up too.

Very happy. I have the Pontiac fan so i am going to see how fitment goes, but the Flex a lite is really doing the job.

 

I got the Pontiac GTO fans in. You have to trim it quite a bit to account for the hoses, and the tabs on it make it a lot wider. The bottom has to be trimmed as it must slide underneath the GTO's radiator. It is spot on in height and maybe a half an inch too wide. If you position the larger fan by the bottom hose/thermostat it will fit. The thermostat sits about an inch and half from the fan blade. I am going to zip tie the thermostat and other hoses just to be safe. It is a little wide so I trimmed the plastc between the fan and the right side in half so it could sit closer. The smaller fan overlaps slightly. When I have the radiator out I can take a closer look.

I wired it to the flex-a-lite controller and it worked fine. Temps with the GTO fan test drive were lower than the flex a lite test drive. It was 188-193 vs 190-195. Coincidentally, the temperature dropped about 5 degrees and the A/C fan went off. The temp went to 204 briefly and stabilized at 197/198 without the A/C fan running. That did not happen with the flex a lite as the A/C fan was running the entire time.

The flex a lite fan kicks a lot of air, and it works well, but the GTO fan covers the entire radiator core and you can feel it pulling air through the entire radiator. It is a tough decision, and will give it some time. The flex a lite controller is running the two fans just fine, but is a bit chinsy.

It would have been awesome, except I broke the tube for the radiator to coolant reservoir off in the process of fitting it. I plugged with a screw and RTV and did the same for the hose. I had to order a new radiator from Lucky 8. Dang it I hate that plastic radiator. If anyone else ends up fixing this fan remove the hose from the top of the radiator and make your life easier and avoid breaking the tab.