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Overheating

Tiny
JWOODARD
  • MEMBER
  • 2003 KIA SEDONA
  • 3.5L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 135,000 MILES
When I run the heater my car runs hot. Radiator has been flushed and refill with coolant, replaced replaced radiator and AC cooling fans, coolant sensor and just replaced thermostat with a 170 degree F. Not losing coolant
Friday, October 12th, 2018 AT 2:00 PM

5 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon.

When you turn off the heater, does the engine cool down?

Usually, it is the other way around.

Roy
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Friday, October 12th, 2018 AT 2:25 PM
Tiny
JWOODARD
  • MEMBER
  • 4 POSTS
Yes, or turn an AC will help cool down.
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Friday, October 12th, 2018 AT 2:41 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, is the cooling fan working at the radiator when it gets hot?

I am wondering if the cooling fan is cutting off and not pulling cool air through the radiator. The fact that it cools down with the AC on tells me that fan is working and cooling the engine.

Roy
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Friday, October 12th, 2018 AT 2:48 PM
Tiny
JWOODARD
  • MEMBER
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I was thinking the same, it actually got hot while I was sitting in the drive through. Is the radiator fan supposed to be a two speed motor? The fan is about four months old.
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Friday, October 12th, 2018 AT 10:05 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
No, it is one speed. It is just turned on by the AC system and the cooling system.

Roy
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Saturday, October 13th, 2018 AT 3:46 AM

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