Only blows hot air under load

Discussion in 'Generation 4 - Maintenance & Troubleshooting' started by Kevin81, Nov 20, 2020.

  1. Kevin81

    Kevin81 SHO Member

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    So...I guess I fouled up the T stat install when I did it.

    Even with the car saying its warmed up, the heater doesn't blow warm air till I'm getting onto the gas. Long coasting/no throttle results in the air getting cooler.

    Stuck/improperly installed thermostat?
     
  2. Alex Staron

    Alex Staron Member

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    Check your coolant, I had the same issue and found I had low coolant, ended up having a leak. Would go cold at idle but blew hot when I was on the gas.
     
  3. ridered74

    ridered74 SHO Member

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    Could be air bubble in cooling system, but I would start with adding coolant. Go a little over the "fill" line in the reservoir. Very common after replacing thermostat. If that doesn't solve the problem, jack the passenger side up and remove reservoir cap and run the car til if reaches operating temps, put the heat on full blast and give her some revs. That usually gets air bubbles out pretty good.
     
    Robert Knickerbocker and Nova like this.
  4. Nova

    Nova SHO Member

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    Sounds like you need to burp the system, just do as ^^ridered suggested and it should get all the air bubbles out.

    Sent from my SM-G986U using Tapatalk
     
  5. Kevin81

    Kevin81 SHO Member

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    Thanks, guys. Gonna do that after work today. When I did the T stat, I didn't burp it, and fluid DEFFINATELY got out, lol.
     

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