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Toyota
Corolla
Engine
Symptoms
Overheat
1999 Toyota Corolla over heating
1999 TOYOTA COROLLA
JEREMY DICKERSON
MEMBER
1 POST
Heater only works when you push gas peddle.whensetting still it blows cold
Nov 27, 2015 at 7:06 AM
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WRENCHTECH
✓
Experienced Mechanic
20,760 POSTS
Sounds like you have either air pockets in the system or a clogged heater core, most likely the latter.
You could try removing both heater hoses from the firewall and flush both directions with a garden hose.
Nov 27, 2015 at 7:19 AM
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