Overheats sitting idle in traffic - hot days

Tiny
RVAHEY
  • MEMBER
  • 1996 HONDA ACCORD
  • 2WD
  • AUTOMATIC
Cooling fan (driver side) does not run. 96 Accord. Overheats on hot days, sitting in traffic. Fan spins freely, motor works, fuse good, relay good. All swapped to other fan to ensure they work. Second fan runs only when car engine is off. To cool engine down. Radiator has been flushed, previously. Hoses good, water pump, good. What else could be the issue? Check list where? Thanks Ron
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Monday, April 11th, 2011 AT 11:44 PM

8 Replies

Tiny
WRENCHTECH
  • EXPERT
Does the fan run when the A/C is on?
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Tuesday, April 12th, 2011 AT 12:29 AM
Tiny
RVAHEY
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Just cranked her back up, turned on the A/C and both fans were running!
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Tuesday, April 12th, 2011 AT 12:35 AM
Tiny
WRENCHTECH
  • EXPERT
It is supposed to run hotter at idle. Have you tried letting it go to see if it goes into the red or not?
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Tuesday, April 12th, 2011 AT 12:38 AM
Tiny
RVAHEY
  • MEMBER
Warmer I would agree, however I think it will go up to red line if I would let it. It usually runs at 1/4 of the temp range. It never had this much of a tempeture change before the last year or so. Always ran below the mid white line on the temp zone/range with or without the A/C running.

Recent example: Sunday, sitting in traffic, (Braves game.) Normal operating temp for the 25 miles or so before we started sitting in near standing traffic. After being in the near standing traffice, it went from normal to 3/4 of the way up, equal distance above the mid point, nearing the upper white line before the red zone. Once I saw this jump, I turned the A/C off and turned the temp to hot to drop the engine temp back to its normal position.

Had no problems today, ran A/C on highway back in to town. No temp swings, nice so I turned off A/C and she ran at the normal temp that I am use to seeing the temp guage at.

Could there be something blocking the flow in system? I am open to any and all suggestions. I have to drive this car for a while, in sales, then is will go to my daughter. Has to be dependable like it has been for the last 14 years. Only 193,500 on her. GREAT CAR!
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Tuesday, April 12th, 2011 AT 12:59 AM
Tiny
WRENCHTECH
  • EXPERT
There is a temp switch in the thermostat housing that turns the fan on for temperature. It is likely defective or there is a problem with the related wiring. There is also a fan control module behind the glove box but I don't suspect that since it works with A/C.
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Tuesday, April 12th, 2011 AT 1:04 AM
Tiny
RVAHEY
  • MEMBER
What is the best way for me to check out the temp switch in the thermostat housing? Can I get the part and replace myself? In my younger days, I was a gearhead and rebuilt engines to make them "go fast". Prem Gas back then was under $0.50 a gallon!
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Tuesday, April 12th, 2011 AT 1:12 AM
Tiny
WRENCHTECH
  • EXPERT
You could use an ohmmeter on it and put it water while you monitor the temp but it's probably easier to just throw a new one in. It just threads into the housing.
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Tuesday, April 12th, 2011 AT 1:14 AM
Tiny
RVAHEY
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Sounds like I just go get the part and swap it out! I do "thank you" for helping me out. I need to keep this car going for a few more years.
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Tuesday, April 12th, 2011 AT 1:19 AM

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