Heat is only blowing out lukewarm air

2001 DODGE RAM

90,000 MILES • 5.2L • V8 • 4WD • AUTOMATIC

ERNIE E TUGMAN

MEMBER
2 POSTS

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

Jan 31, 2017 at 12:24 AM

HMAC300

✓Experienced 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.

Apr 23, 2021 at 3:55 AM

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

Apr 23, 2021 at 3:55 AM

HMAC300

✓Experienced 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

Apr 23, 2021 at 3:55 AM

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Heat is only blowing out lukewarm air

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