Heat won’t stay hot

Asked by TAPERMIKE815 Apr 03, 2019 at 08:54 AM about the 2002 Dodge RAM 1500 SLT Quad Cab RWD

Question type: Maintenance & Repair

My trucks heat won’t stay hot. I’ve replaced
Hester core thermostat had to replace
radiator and I’ve worked all the air out of the
lines. Idk if it’s a vent in my hvac unit I’m not
sure what else it could be

1 Answer
4,640

jetjurnigan answered 5 years ago

Ya mite also re-check the system for air anyhow. Pull the radiator cap (while cold, of coarse)...let the engine run, keep the idle up and "milk" the upper radiator hose again and again. You mite be surprised how much air can get trapped in a heater core. Pump that puppy good...I've made some qwik easy money off people who swore that they properly bled the coolant system. Not saying this is definitely your problem...however, start with the most simple n obvious.

Mark helpful

Your Answer:

Related Questions

  • Heat won’t stay hot 1 Answer

    My trucks heat won’t stay hot. I’ve replaced Hester core thermostat had to replace radiator and I’ve worked all the air out of the lines. Idk if it’s a vent in my hvac unit I’m not sure what else ...

    2002 Dodge RAM 1500 SLT Quad Cab RWD

    -

    Maintenance & Repair

  • Heater won’t blow hot air and clicking noise comes on and goes off 1 Answer

    Heater won’t blow hot air. Clicking noise comes on and goes off

    2009 Dodge RAM 1500 Laramie Crew Cab 4WD

    -

    Maintenance & Repair

  • heat 4 Answers

    Why would my heat stop working?

    Dodge RAM 1500

    -

    Maintenance & Repair

  • heat 1 Answer

    heat blows slighty not full

    2004 Dodge RAM 1500 Laramie Quad Cab RWD

    -

    Maintenance & Repair

  • heat 2 Answers

    I've checked all 4 EVAP doors and the heater core, all work properly but still no heat...what could be the problem?

    2001 Dodge RAM 1500 SLT 4WD

    -

    Maintenance & Repair

Shortcuts

Search Dodge RAM 1500 Questions

CarGurus Experts

  • #1
    Dan Connell
    Reputation
    19,910
  • #2
    dandyoun
    Reputation
    15,170
  • #3
    Gene Arnett
    Reputation
    11,710
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Ford F-150
294 Great Deals out of 14,028 listings starting at $3,888
Used Chevrolet Silverado 1500
170 Great Deals out of 7,303 listings starting at $6,495
Used GMC Sierra 1500
155 Great Deals out of 8,158 listings starting at $5,500
Used Dodge RAM 2500
3 Great Deals out of 31 listings starting at $7,900
Used Toyota Tundra
41 Great Deals out of 948 listings starting at $10,698
Used Toyota Tacoma
45 Great Deals out of 862 listings starting at $9,975
Used Chevrolet Silverado 2500HD
33 Great Deals out of 1,560 listings starting at $5,990
Used Dodge Durango
58 Great Deals out of 1,850 listings starting at $9,998
Used Jeep Grand Cherokee
123 Great Deals out of 3,826 listings starting at $3,922
Used Ford F-250 Super Duty
24 Great Deals out of 856 listings starting at $9,995
Used Ford Mustang
49 Great Deals out of 1,643 listings starting at $5,999

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.