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Heater only blows warm air. Thoughts?

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Old Apr 30, 2012 | 02:48 PM
  #16  
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There was a recall on this part. Call your local dealer
Old Apr 30, 2012 | 03:18 PM
  #17  
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as others have said, air in the system is your most likely culprit.

give it a few days and watch your coolant level and temp.
Old Apr 30, 2012 | 03:18 PM
  #18  
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Originally Posted by Marpoe34
There was a recall on this part. Call your local dealer
A) This thread is old and the issue at hand has been solved.

B) If you read the OP you'd see that the TSB is not in question whatsoever. My issue was due to the fact that I had a thermostat that opened at 143*F, and thus was too cold for the heater to blow hot air.
Old Apr 30, 2012 | 03:19 PM
  #19  
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Originally Posted by chansigril
as others have said, air in the system is your most likely culprit.

give it a few days and watch your coolant level and temp.
See above.
Old Apr 30, 2012 | 03:49 PM
  #20  
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lol people bumpin it up glad you got it resolved.
Old Apr 30, 2012 | 04:00 PM
  #21  
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Originally Posted by chansigril
lol people bumpin it up glad you got it resolved.
No worries! Thank ya much.
Old Apr 30, 2012 | 04:07 PM
  #22  
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Now that a resolution has been posted. It may stay buried. Unless a thankful soul wants to reply with a thank you for helping solve their problem.
Old Apr 30, 2012 | 04:09 PM
  #23  
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Originally Posted by EVO8emUp
Now that a resolution has been posted. It may stay buried. Unless a thankful soul wants to reply with a thank you for helping solve their problem.
Thanks for your reply.


Old Apr 30, 2012 | 04:10 PM
  #24  
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Anytime, part'na.
Old Jan 29, 2013 | 07:37 PM
  #25  
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fyi this did turn out to be the thermostat for me, to the surprise of my local shop. car's coolant temp reading rises so much slower now (used to be very quick with the old thermostat), and i actually get heat.
Old Jan 30, 2013 | 01:49 PM
  #26  
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I was looking through the Service Manual instructions for changing the thermostat. I don't remember removing a radiator hose or completely draining the the cooling system. You do need to drain sufficient coolant to lower the coolant level to below the thermostat housing.
Old Jan 30, 2013 | 01:57 PM
  #27  
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I've gone through a couple of thermostats personally. I have no idea why other than bad luck. Luckily replacement is quite simple. Drain some coolant, pop off the upper radiator hose by the thermostat housing, remove the 3 bolts and bam! remove the old tstat. Clocking it was something that was in question and I never did figure out how the bleeder should be oriented. If you are looking directly at it I had it at 6 o clock and I havent had any issues. Good luck!
Old Dec 12, 2016 | 07:38 PM
  #28  
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Had the same issues with my 05 legacy and it was air pockets in the coolant system.
Old Dec 12, 2016 | 07:50 PM
  #29  
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I just got out of garage tonight after replacing the thermostat. My Evo has always had a great heater. Not this year. I still had the old thermostat that came in it from the factory so back in it went. We'll see.
Old Dec 16, 2016 | 12:42 PM
  #30  
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The old thermostat had been in the car for 60K and the rubber seals were hard. But it was what I had. The thermostat I took out of the car was closed completely - no air gap. Also, no other visual sign of failure. But now that the junker thermostat is back in the car I have heat, which is good since temperatures are supposed to fall below zero this weekend.

Without boiling the two thermostats together I conclude the thermostat that acted up had started opening early (this isn't the first time I have encountered this). How this can happen with a wax pellet design is beyond my understanding. The melting point of the wax would have to change.


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