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90 Reatta showing hot but isn't....


Guest Sidney22

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Guest Sidney22

I pulled my 90 Reatta from the garage this morning and drove it to work. Coming back to the office from running errands, the temperature indicator showed that it was getting hot. The a/c stopped cooling, but kept blowing. When it reached the point of TELLING me it was HOT I pulled over. However, the radiator has coolant and the engine has oil and transmission fluid. No indication that the ENGINE was actually getting hot, but the indicator kept telling us it was. Both cooling fans are running fine. Best we can figure, it might be the engine temperature switch. No belts or hoses are broken or leaking. So..... where IS the temp switch and can we replace it ourselves, without having to get it to a mechanic? Or, is there any other possibilities that somebody else can suggest?

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Guest Sidney22

Padgett, the a/c will blow cold just fine as long as the car is just started up and cool. Once the car starts showing "hot", the a/c stops blowing cold air. We'll go into the diagnostics mode in the morning and check!

Edited by Sidney22 (see edit history)
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You can also use one of the cheap inferred thermometers to check the actual temperature of the radiator without opening it. Harbor Freight has them as well as the tool section of the Reatta Store. All you have to do is point it and pull the trigger for an instant readout of what the laser pointer it touching. Very handy for checking for plugged catalytic converters as well. Below is a photo of the one I own. I use it on an engine when it's running good to know what to expect when something goes wrong.

post-52331-143141981128_thumb.jpg

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  • 2 weeks later...
Guest Sidney22

Ran the diagnostics this morning. Let me start (do NOT laugh) by saying, there is NO way I am a mechanic, and truly understand VERY little about how cars run but I probably understand more than most girls! Ran them all on a cold engine with the engine off. Seems like some need to be run with the car running? This run through, the ED04 was 036. Let me know which (if any) of these need to be run with the engine running please.

Oh, and Ronnie, I HAVE one of those infrared thermometers!!! Will check that, thanks!

Edited by Sidney22 (see edit history)
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Guest Sidney22

Oh... actually, I am in Texas and it was probably over 100 degrees that day. However, car had been in the garage and all I did was to back it out where both doors could be opened. Was that enough to raise that temp?

BD26 was 34 and BD27 was 33.

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