RX - 1st Gen (1999-2003) Discussion topics related to the 1999 -2003 RX300 models

No heat

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Old 07-18-13, 03:38 PM
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Pita74
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Default No heat

I have a 1999 RX300 with 128,000 miles and for no known reason the heater has quit working. A/C works fine but no heat. Any ideas?
Old 07-23-13, 03:15 PM
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gsenthil
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Pita- check what happens when you set the temp to HOT. If you get heat at HOT then it might be your air mix servos. I had the reverse problem where the AC didnt work unless I set to COLD. Once the air mix servo was replaced everything was ok.
Old 07-23-13, 05:52 PM
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salimshah
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No heat in summer? Here in central Texas, we just have to lower the window

I would also check the coolant level ... not just the level in overflow but in the radiator [with engine cold].

Salim
ps: I have moved these posts to a new thread as they had nothing to do with high-milage
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