Question about 1995 Pontiac Grand Am

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Heater blows cold air but heater core does not leak

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Could be your thermostat.

Posted on Jan 09, 2013

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If it is necessary to remove the heater assembly, the cooling system must be drained before removing the heater core.
When a heater core leaks, a new heater core is installed or the old one repaired.
Heater Housing

  • The heater housing is usually under the dash and must be removed to gain access to the heater core.
  • Procedures for replacing the heater core vary with the year, make, and model of car. It threfore necessary to consult the manufacturer's repair manuals for the proper procedure for replacement.
heater blows cold air but heater core does not - f74-01.gif The heater housing is disassembled to get to the heater core. Heater Core
  • Remove the access panels(s) or the split heater/air conditioning case to gain acess to the heater core.
  • Remove the heater coolant hoses.
  • Remove the cable and/or vacuum control lines (if equipped).
  • Remove the heater core securing brackets and/or clamps.
  • Lift the core from the case. Do not use force. Take care not to damage the fins of the heater core when removing.
  • To reinstall the heater core, reverse the removal steps.
When the heater core leaks and must be repaired or replaced, it is a very difficult and time-consuming job primarily because of the core's location deep within the firewall of the car. For this reason always leak test a replacement heater core before installation.

Posted on Jan 11, 2011

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Posted on Jan 02, 2017

  • 104 Answers

SOURCE: heater blows cold air have replaced the thermostat

sounds like the controller went bad use temp checker see what your temp is at inlet of heater core from hose

Posted on Sep 08, 2009

james klgr
  • 362 Answers

SOURCE: 2002 montana getting overheated

sounds like a stuck thermostat. but check if the system has a bleeder screw if it does burp it and that will help also.

Posted on Dec 13, 2008

  • 651 Answers

SOURCE: heater blowing cold air

squeeze the hoses to get any air bubbles out and refill coolant as necesary. are you sure you put thermostat in the right way? may be backwards. also may be your sensor.

Posted on Jan 04, 2009

  • 5 Answers

SOURCE: 1996 chevy s10 heater not blowing hot air

heater core or leak on cooling system

Posted on Jan 06, 2009

  • 3 Answers

SOURCE: blowing cold air

I had the same problem that I just fix by flushing the heater core out with a hose.   take the two hoses off the fire wall and put the water to it and let flush.  my heater is putting out 150 dg. F  of hot air.   I'm so excited!  i will stay warm now.

Posted on Feb 27, 2009

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1 Answer

Heater in 1995 Bronco is blowing cold air....What could be causing this?


If the heater is blowing cold air and the car is overheating, it is likely that the problem is related to the engine cooling system as well. The following are some issues that may be causing the heater to blow cold air:
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- Jim

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