Hi All. As the title suggests I have had the symptoms of a failing 2nd thermostat. Got the part number from this forum and after a bit of double checking took the part number to my independent garage for them to change. So far so good. The part number should be 1K0121113A but on checking the invoice the part they put in has the suffix QA. They say they got this from the main dealer and is a genuine part. Still getting problems. The car heats up quicker but struggles to reach 90 degrees and the temp fluctuates as before. An internet search and a search on this forum shows no result for a 1K0121113QA.

Question is have they put in the wrong part or is there another problem?

Car is a 2013 FL 2.0 Diesel so CFGB engine (I think) and 6 speed DSG  and has had water pump changed recently and gearbox oil changed.

Thanks in advance. Steve

41 minutes ago, steve149 said:

The car heats up quicker but struggles to reach 90 degrees and the temp fluctuates as before.

Real coolant temperature rather than software stabilised "gauge temperature" does fluctuate, so maybe it's a software issue in the instruments?

1 hour ago, steve149 said:

Question is have they put in the wrong part

I should think it was probably just a typing error on the invoice? How much was this part? 

 

If you're a very lucky person, it may have been installed with the part number facing in a direction where it can be seen unobstructed by too much other stuff..

 

 

Edited 29 December, 20214 yr by Wino

Thanks for the quick replies. Temp never varied from 90 degrees until a few months ago. Will have look at the part when it stops raining to see if there a number. They still have the old stat and hopefully the bag the new one came in but not open till the 4th. Steve

It's also entirely possible that the main thermostat on the radiator is also stuck open. 

Although the dsg thermostat is often the culprit, it's not always the case.

Hi. Had a look at the part but can't see the number. It was £27 for the stat. Might have to change the main thermostat as well. Seems OK in outside temperatures above 5 degrees but struggles below that. Steve

Sounds like about the right price for the DSG stat.

 

QA is a revision part number, ie the part has been updated or changed in some way and so is given a new suffix.

Any idea what the revision could be. QA doesn't show up on any search. 

Don't know wether to have the unrevised part put in or the main thermostat changed (or both). 

Thanks for all the replies.  Steve

I am near certain the QA was just clumsy fingers on keyboard. Ask the garage that fitted it to check what they bought.

18 hours ago, Wino said:

I am near certain the QA was just clumsy fingers on keyboard. Ask the garage that fitted it to check what they bought.

Now there is some lateral thinking , well done Wino

Cheers. Will check when they open next week. I suppose q and a are close together on a keyboard so could be an error. Probably change the main stat and will post the outcome. Thanks to all. Steve