2003 Pontiac Montana Heater Will Blow Cold Air Sometimes Warms Mostly Cold

2003 PONTIAC MONTANA
150,000 MILES
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ANONYMOUS
  • MEMBER
  • 1 POST
heater will blow cold air and sometimes it warms up, but mostly cold, what could be problem
Nov 10, 2012 at 11:49 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
make sure hoses are both hot on heater when engine warm. then you'll hav eto check actuator in heater box. pic is of actuator but it shold be scanned to see what is wrong
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Jul 10, 2017 at 11:30 AM
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JOHNVIALLET
  • MEMBER
  • 1 POST
I think your water pump is needing replacement as this was the problem same problem that I had
Jul 10, 2017 at 11:30 AM
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