2008 Toyota Sienna with Heat problems

40

Asked by Wingnit Jan 18, 2017 at 09:49 AM about the 2008 Toyota Sienna XLE Limited AWD

Question type: Maintenance & Repair

I just bought a 2008 Sienna a few months ago and has been a nightmare
since. This is my 3rd Sienna and never had all these problems. The first
issue was the water pump leaked so we had that fixed. Then the motor was
overheating and we didn't have heat in the car. Dealership changed
radiator and thermostat. Then it was leaking again, trans was sluggish and
still no heat. The dealership didn't tighten the bopttem transmission line on
radiator,  I think now all leaks have been fixed but we still have no heat.
The heated seats work just blows cool air out of vetns. Any suggestions?

3 Answers

40

Thanks! I will check the coolant. The local mechanic wasn't sure what the problem was so I went to the dealer. I am hoping someone else had run into the same problem and had a solution.

4 people found this helpful.
30

Hi, I also bought 2008 sienna 3 weeks before, it's heating is not working, radiator, thermostat changed, heater core and pipes flashed, after that heater was good just for 2 days, after that first hot air finished and than engine becoming heatup

3 people found this helpful.

I had the same problem. Mechanic found that the coolant was down about 1 gallon. It must have been a very slow leak as it was not noticed - no puddle in the parking place. He noted that the heat is created at the top of the system. So, if the fluid is down that much it might not effectively heat. He topped it off and the heat worked right away when I drove it home on a cold winter day just last week - in Minnesota.

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