Glowworm CXI fault code F7

[Larko]

Hi All.
Just had fault code F7 appear on our boiler, after it has been making a noise for a week or so. Plumber should be coming around tomorrow, but the fault code has made me a little more concerned. Unfortunately I cant find anything on this fault code anywhere, is anybody able to help?

Its only 2 1/2 years old so not happy to have something wrong just out of warranty!!

Thanks very much for your help
Richard

 

[Larko]

Plumber has been around and says it is the pump. Can someone tell me where online is best to find out what sort of price I should be paying for this?
Thanks
Richard.

 

[Andygasman2010]

On a CXi fault code F7 is "hot water thermistor" fault, nothing to do with the pump so that may be a seperate issue. A faulty pump may be responsible for the noise thought as your plumber has suggested.

Why didn't your plumber give you a price to repair it?

 

[Agile]

Are you another customer who gets the plumber to come round to diuagnose the problem free and then you set about repairing it yourself?

I always charge a diagnostic fee so avoid customers aiming to rip off boiler engineers!

 

[Larko]

He is phoning around suppliers as he didnt know the price. I have no idea how to do this myself, I have recently been stung on my car with work being done that didnt solve the problem so I now look into other opinions more.

 

[Agile]

Andy says F7 is the thermister which costs about £20.

I dont know who is correct, but question your fellow as he may have got it wrong. Sometimes we can make a mistake here but thats rare and usually corrcted by someone else very soon.

The pump is going to be around £100 or more!

Failing pumps make a noise but termistors are silent. It may have both faults!

If you have ( had ???? ) paid him to diagnose the fault then you will expect him to get it correct and NOT to replace unnecessary parts at your cost.

Tony

 

[Andygasman2010]

We try not to give prices out on here because there are too many variables from job to job and it's especially difficult on a forum.

Only thing i'd say is that F7 won't be resolved with a new pump. A faulty pump would give you the noises you described and possibly F5 fault code (this would cut the boiler out completley and you'd need and engineer to reset it)


http://www.glow-worm.co.uk/stepone/data/downloads_sd/51/00/00/cxi-range.pdf Page 39 has a list of fault codes for your boiler.

 

[Larko]

Thanks all, he is going to replace the pump, I will ask him about the thermister when he comes around though.

Thanks very much for your advice.