I have RX 300 Lexus. The air conditioner works. When I tried the heat for the first time it only blows cold. No heatt. The fuses look fine. I just bought the car and never checked the heat. Any thoughts.

Asked by Nov 06, 2013 at 09:28 AM about the 2002 Lexus RX 300 Base

Question type: Maintenance & Repair

I turn the heat to hot but it still blows cold.  I just bought the car in FLA so I just checked the air conditioner. I moved to NC and just checked the heat and no hot air Its blowing but not hot..  I remember the air not working as good right before it got cold but it was so hot I could be wrong. Does freon have anything to do with heat as well as air.?  Please help.  Thanks

3 Answers

3,275

Check your coolant level. Water pumps are common on these to leak, and the incorrect coolant level will affect the heat.

2 of 2 people found this helpful.
3,665

I presume the repair has been made. I helped a co-worker with her 99, same symptoms. This has an elaborate climate system, accessed behind the glove box. Allow several hours, and at least $160 for the new air mix servo, the likely culprit. There are 2 others, the mode servo (floor/vent/defrost/mix), and recirc servo, less likely, since heat is the issue here. here is a forum link, a little googling will show the process. http://us.lexusownersclub.com/forums/topic/71031-no-cabin-heat-2000-rx300/ The Lexus dealer charges $500 and up to fix this.

3 of 3 people found this helpful.
20

My 2007 RX350 no heat from the heater. It turned out the water level in the radiator was VERY low. Once I topped it off I got my heat.

2 of 2 people found this helpful.

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