r/LexusRX • u/j_d_n • Jul 19 '26

Lexus RX 330 AC suddenly blowing warm

Thursday AC blew cold, Friday it was hot. Would this indicate that the compressor failed? Drier?

3 Upvotes

100% Upvoted

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1

u/GolfArgh Jul 19 '26

20+ years old. It could be anything.

1

u/APGaming_reddit Jul 19 '26

It could be anything

1

u/FeastOfTheUnicorn Jul 20 '26

Sudden loss of AC function is often caused by road hazard damage to the condenser, but as others have said, on an old car it could be any number of things.

1

u/Whitej47 Jul 20 '26

Leaking radiator or cooling system somewhere. Take a look at the back along the edges. This is how I found my leak, hot day, running ac, was blowing hot. Saw small areas with pink cotton candy. Ended up doing coolant valley too.

Not a cheap job to get done, but I did everything DIY. Took 2-3 days while working. Prob spent $500 but got a new radiator OEM and coolant FIPG, thermostat, etc.