Can you help me with my heater problem

Tiny
RICHIEAMBER
  • MEMBER
  • 1991 CHEVROLET CHEYENNE
  • 177,835 MILES
I have changed the radiator and heater core and thermostat. And still blows cold and the radiator hose stays hard even after I changed the thermostat.
Sunday, February 12th, 2012 AT 9:02 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
The hoses staying hard is normal. With the engine running, warmed up, and the heater on high, feel both heater core hoses. Both should be hot. If they are, check and repair the blend air door located near the heater core. If only one is hot, check for air blocks. Try to bleed coolant through the heater core. I usually loosen the return line.
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Sunday, February 12th, 2012 AT 9:09 PM

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