1994 GEO PRIZM HEATER CORE PROBLEM

  • Tiny
  • Mcda1953
  • 1994 GEO PRIZM

Heater problem
1994 Geo Prizm 4 cyl Two Wheel Drive Automatic 212000 miles

I recently installed a new head with all new hoses, thermostat, radiator etc. Before the heater would not heat at engine idle. Worked ok on the road. Now it doesn't heat at all. I checked the input and output ports on the firewall. I do have hot water going into the heater core and returning. I also tried running water both ways thru the heater core with a garden hose. It runs thru clear and clean. There are no leaks at all. Any idea what might be the problem? Your thoughts will be greatly appreciated.
Thanks

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Wednesday, November 10th, 2010 AT 11:48 AM

2 Replies

  • Tiny
  • Docfixit
  • EXPERT
  • 18,992 POSTS

Blend door not directing air flow through core

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Wednesday, November 10th, 2010 AT 12:03 PM
  • Tiny
  • Mcda1953
  • MEMBER

Thanks that fixed the problem. I really appreciate it.

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Sunday, November 14th, 2010 AT 11:42 PM

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