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2nd Generation (2004-2010) Discussion area for the second generation Toyota Sienna.

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Old 12-02-2011, 10:11 PM   #1 (permalink)
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heat comes and goes

hi all. 2007 Sienna, sometimes it has heat, sometimes not. don't want to take it to the dealer because the service manager is a crook. any ideas?
thanks
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Old 12-04-2011, 05:41 PM   #2 (permalink)
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USA

It's possible the heater control or the heater core might be going out on you. You can get either for pretty cheap online.
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Old 12-06-2011, 06:10 AM   #3 (permalink)
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thank you. is this something I can replace and, if so, are there directions available here?
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Old 12-06-2011, 06:52 AM   #4 (permalink)
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when you don't get heat, does the fan still blow air, or not?
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Old 12-06-2011, 08:07 PM   #5 (permalink)
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yep, the fan does work. this only happens when my wifey drives, hasn't acted up with me. and it happens very sporadically.
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Old 12-06-2011, 08:31 PM   #6 (permalink)
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Quote:
Originally Posted by dieselpartsman View Post
yep, the fan does work. this only happens when my wifey drives, hasn't acted up with me. and it happens very sporadically.
First step in troubleshooting: Replace the wife and see if the problem goes away.
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Old 12-08-2011, 08:07 AM   #7 (permalink)
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were does the heat come from?
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Old 12-22-2011, 07:20 AM   #8 (permalink)
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after much consideration, I kept the wifey and took the van in under extended warranty. back heater core was replaced and now works fine. front heat issue was fixed with a new radiator cap. van and wifey are both happily warm. merry christmas!
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Old 12-22-2011, 08:05 PM   #9 (permalink)
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Radiator cap, eh? I wouldn't have guessed. Thanks for letting us know.
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