Shower luke warm following gas safety certificate inspect?

[MrShed]

Hi all,

Had a gas engineer come out yesterday to perform a gas safety certificate inspection for letting out. Since then, the shower will only go up to lukewarm no matter how high it's set.

Key points:
- combi boiler
- thermostatic mixer shower
- all other taps etc fine
- only thing changed on the boiler was the timer
- tried varying temperature dial to no effect
- boiler is definitely firing up once shower turned on

Anyone any ideas? It would seem to be strange that the inspection and relevant tests could have caused such a problem, and I'm certainly not saying it definitely has, but it seems very coincidental! Obviously will ask the engineer but any ideas would be greatly appreciated.

 

[Agile]

If he opened the boiler to change the time clock then its possible he disturbed something.

You have not bothered to tell us the boiler make and model so cannot make any more detailed guesses.

The water control knob should make a difference to the boiler output temperature as measured/felt on its outlet pipe underneath.

Tony

 

[MrShed]

Hi,
Thanks for your reply. The boiler is a potterton heatmax. Just for clarity - the temperature dial certainly makes a difference to the output hot temperature, just not to the shower.

 

[Madrab]

If the output from the boiler to the other hot outlets is fine then it sounds like the trouble might be at the inlet or thermostat of the shower.

 

[Agile]

Exactly!

So the RGI is thankfully exonerated!

Tony

 

[MrShed]

Completely agree that this is what it sounds like, just seemed very coincidental!

 

[JohnD]

Thermostatic mixers very often have an anti-scald control. Sometimes there is a button you can press to enable the knob to go to a higher setting.

 

[MrShed]

OK so - for everyones interest, this was in fact due to the gas safety inspection!!

The RGI had reduced the water pressure for the boiler during the inspection. He has now increased it again and all of a sudden the shower has sprang back to life.

 

[Madrab]

Was the drop in water pressure not apparent, if it had been dropped as part of the inspection I would have thought it would have been noticeable?

 

[MrShed]

Was the drop in water pressure not apparent, if it had been dropped as part of the inspection I would have thought it would have been noticeable?

No, not at all - nothing noticeable in the other outlets.