morehwr

I have a 2001 RX300. I changed my spark plugs now I do not have any heat in the cabin. What did knock off or loose when i had my hands behind the manifold??

thomas1

My wifes car is not home yet, but the heater hoses come out on the left (driver side) of the firewall. Look in that area near the rear plugs and see if you smashed the pipes or if there is a valve for the heater lines. I didnt think there was, because Lexus mixes hot and cold to achieve temperature settings, but maybe there is....I will check When wife gets home....

salimshah

Blind guess ... electrical connector that got disconnected or you might have forgotten to re-connect.

The other guess would have been vacuum line, but that I think is not used to activate heat.

Salim

carguy07

As mentioned above, most cars have a heater control valve of some kind that bypasses the heater core when it is not needed. My guess is that you knocked off a vacuum line or cable the moves the valve. Just a guess.

salimshah

morehwr:

You may noticed a revival of thread
https://www.clublexus.com/forums/sho...d.php?t=246269

I am listing it here in case a search brought some one here in future.

Salim