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Heat is only blowing out lukewarm air

Tiny
ERNIE E TUGMAN
  • MEMBER
  • 2001 DODGE RAM
  • 5.2L
  • V8
  • 4WD
  • AUTOMATIC
  • 90,000 MILES
It seems I am only getting lukewarm heat the temperature is at 190 degrees, but when fan blowing full I still have lukewarm heat. I even put a peice of cardboard in front. I was wondering if maybe I should change the Antifreeze? This engine was put in 2011. Could the thermostat be stuck wide-open?. Thanks, Ernie
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Tuesday, January 31st, 2017 AT 8:24 AM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
If temperature is 190 degrees and both heater hoses feel like it. Then it is probably the blend door actuator. Pull fuse inside truck for HVAC for sixty seconds with key on and it may reset. If not you will have to check to see if power is going to it.
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Friday, April 23rd, 2021 AT 10:55 AM
Tiny
ERNIE E TUGMAN
  • MEMBER
  • 2 POSTS
I tried that it didn't work this morning it was 20 degrees outside and the temperature gauge in my truck got to 170, well may truck shows 130 - 210 - and 260 So by guessing my trucks running 170 today but never moves up or down today and the heat is well luck warm if that. Im not sure how a thermostat works but was wondering could it be stuck open. Thanks Ernie
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Friday, April 23rd, 2021 AT 10:55 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
It's more like a blend door problem I think, if it feels hot to touch it's probably hotter than 170
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Friday, April 23rd, 2021 AT 10:55 AM

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