I only have cold air

[Lplate]

Hi all.

New to Lexus world.

Just purchased an Ls460 sel 2009 with 90k.

Allways had mercy bmw and Audi...

God what have been misding???

Anyway one small problem and not the best at rhis time of year.

My Lexus yesterday started giving just cold air even with dials on Hot.

The day before it did the same but as I built up speed ut became warm. Got home today and did the obvious by checking coolant resevoir and yes it needed topping up bu about a litre or so. Got car ticking over until it reached peak temp. But still only cold air.

Drove it down the road and heat returned. Then stopped and heat went down again. 

Any thoughts on this or even similar experiences or a solution.

Thanks in advance everyone.

Luis

[Herbie]

Take it straight back to the trader you bought it from and get them to sort it at their expense.

[Malc]

I hope you're not losing coolant into the gearbox  

Has the radiator been changed yet ?  It is due at 100k and 10 years for sure 

Malc

[cruisermark]

Hi

One of the members on the GS forum had a similar problem and the problem pointed towards a blocked heater matrix - maybe have this checked?

[Lplate]

On 10/17/2020 at 10:59 AM, Malc said:

I hope you're not losing coolant into the gearbox  

Has the radiator been changed yet ?  It is due at 100k and 10 years for sure 

Malc

On 10/17/2020 at 10:59 AM, Malc said:

I hope you're not losing coolant into the gearbox  

Has the radiator been changed yet ?  It is due at 100k and 10 years for sure 

Malc

I have no idea. But I kerp topping up water on resevoir but don't see any water loss on the ground 

It has full lexus service history. No rad replacement there.

I'm going to need an independent to look after it. I'm in Reading but don't mind travelling for a good indi. Think ill post something on here and see rhe feedback.. thanks

[Lplate]

Funny thing is when I rev it then the heat dies kick in abd if I let it idle then it goes again.

Also noticed that when on idle and resevour is empty if I take the top off then I can see water coming back in and circulating

[Bluesman]

Where did you refill the water when it was empty of water?

[Cotswold Pete]

I had same in my 400, turned out to be leaky radiator with a hole that was small, but one cold day, noticed a bit of steam drifting out of grill which confirmed the problem

Maybe Japex up in Kings Langley are worth a call

[steve2006]

If you are losing coolant constantly and there are no obvious external leaks it has to be going somewhere internally. There have now been many cases of the engine coolant mixing with the transmission fluid due to a defective radiator intercooler. Given this problem I would get the problem investigated ASAP before you also possibly end up with a failed transmission.

Also as previously mentioned if your car was purchased from a dealer you have Consumer Rights regarding defects within the first 6 months.

[Lplate]

Thanks all but I know the problem.

Found a Lexus indi who was highly recomended in Maidenhead call UK TEKNICS.

its a leaking radiator so our vones the wallet.

Actually its too  bad but I thought best not to get a quote from Reading Lexus

[Bluesman]

7 hours ago, Lplate said:

Thanks all but I know the problem.

Found a Lexus indi who was highly recomended in Maidenhead call UK TEKNICS.

its a leaking radiator so our vones the wallet.

Actually its too  bad but I thought best not to get a quote from Reading Lexus

Be careful with them, I had a bad experience with them.

[Lplate]

Ok yes it was a Radiator leak and got it repaired at UK TECNIK.

git to say very impressed with approach and repair. Cost me just over 550.00 all in.

I won't say what Lexus wanted.

Not even worth considering.

Very impressed with these boys and would highly recomend them as reliable indi.

[Bluesman]

12 hours ago, Lplate said:

Ok yes it was a Radiator leak and got it repaired at UK TECNIK.

git to say very impressed with approach and repair. Cost me just over 550.00 all in.

I won't say what Lexus wanted.

Not even worth considering.

Very impressed with these boys and would highly recomend them as reliable indi.

Be careful with them, I had a bad experience with them. I am pleased that you had a more positive experience than I did.

[runsgrateasanut]

When you say, got it repaired I trust they replaced the Radiator and didn't just solder the leak?  Best a new Radiator as others have pointed out that some Rads cause the death of these lovely Gearbox's  when corrosion starts internally..