Tag Archives: AC

Cooling Issue? I’m your man…

Everyone has that “guy”… you know the one that you call for a specific something when you are in need.  No, I am not talking about the one that will help hide the body, but more so the one that you call when you have a question that you know they can answer.


Well I’d like someone out there to see if they can stump me.  Submit me an AC or powertrain cooling question and I’ll do my best to see if I can help work you through it.  Maybe I get it right and save you some $$$.  Maybe not, but lets face it – a direct specific answer is probably better than reading a bunch of message boards in hope someone has the same problem.

Aside from slinging wrenches for more years than I care to count I also have some industry contacts in my arsenal to help me in case I do start to feel lost.  I obtained my master auto ASE in my twenties and have maintained it since.  I find solving problems helps keep the mind sharp.



P. Heffcac




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Shroud and air flow…

Shrouds make all the difference in how a vehicle cooling system performs.  Take it to the extreme, look at F1 and NASCAR’s… any deviation in the panels changes the speed of the vehicle. Cars lose a couple of mph easily from just missing bumper pieces. Air is effected the same on your vehicle.

Perfect example. F150 was running hot. Customer ‘diagnosed’ the faulty fan clutch and replaced it.  Now the vehicle cools fine… except the A/C short cycles.  Before dropping $500+ for a compressor, drier, oil, etc (future posts to come on why you replace the critical stuff together) he brings it to me.

Gauges show the high side spiking well over 350psi causing the cutoff switch to short cycle the A/C clutch.  Customer swears he followed the under-hood sticker for the quantity. I then notice some plastic missing on the top edge of the shroud. He fessed up that it broke off during the fan clutch install.  I told him that he needed a new shroud. He called BS.  So I bet him $50 and a case of beer. I slapped on a piece of duct tape and tested my theory.

Let’s just say that beer was ever sweeter than normal.


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