A/C light flashing - engine hunting

[Brechin Slate]

Hi folks, calling on your technical wizardry....

On Tuesday evening, I started my engine and it immediately started to hunt with a rev range of about 200.  Drove off thinking it would clear as the engine came up to temp and it did.

Today I noticed that my A/C light was flashing. I pressed it and immediately the engine began to hunt again.  I turned off the A/C and the engine stalled.  I tried it a few more times with the same result.  Just to make my day I just handed £1100 over to Lexus to get my car through it’s MOT but that’s another story. Any thoughts? Should I be looking to replace my pride and joy.

Best wishes to all.

Mike

‘56 plate is250 SE L 140,000 miles

[johnatg]

A/C compressor seized?

[is200 Newbie]

Does this correspond with the work don't at MOT?

[johnatg]

Wouldn't have thought so. Not for the test anyway.

What work was needed?

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[Brechin Slate]

23 minutes ago, johnatg said:

Wouldn't have thought so. Not for the test anyway.

What work was needed?

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New discs and pads front. Rear calipers and pads

Price also included minor service and MOT test.  Not related to aircon issue. £176 of it was VAT. 

[johnatg]

Hmm... can't see how that could affect the aircon.

Compressors do just fail spontaneously sometimes. Try an aircon specialist rather than Lexus.

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[Fishboy]

Never turn your A/C off, unless you are changing your pollen filter. No point having climate control and not using it.

 

[chr15gb]

Have a read of this

https://www.lexusownersclub.co.uk/forum/topic/107893-ac-light-flashing-and-rpm-jumping-when-on/

[Brechin Slate]

Superb response which answers all my questions.  The way forward is much clearer.  Many thanks everyone for your contributions.