Search the forum,

Grohtherm 3000 (19665) - Boiler not recognising demand for hot water

Discuss Grohtherm 3000 (19665) - Boiler not recognising demand for hot water in the Plumbing Jobs | The Job-board area at PlumbersForums.net

Status
Not open for further replies.
F

Fleetman

Messages
3
When attempting to use the shower our combi-boiler does not fire up in response to the demand for hot water. However, if using the Exafill to run water into the bath then the boiler DOES fire up - as it does also with other hot taps in the house.
British Gas service engineer has checked the boiler and says that the fault is with the shower not the boiler.
Anyone familiar with this model of shower who can assist with a possible diagnosis?
 
The shower has non-return valves inside, under the two brass covers either side of and just above the temperature control. Worth taking these out (requires 8mm allen key) and making sure they are free. If stuck, shower may draw insufficient hot to fire boiler.

Note. Water off first!
 
steadyon said:
The shower has non-return valves inside, under the two brass covers either side of and just above the temperature control. Worth taking these out (requires 8mm allen key) and making sure they are free. If stuck, shower may draw insufficient hot to fire boiler.

Note. Water off first!
Click to expand...
Thanks for the advice. Much appreciated!
 
Status
Not open for further replies.

Reply to Grohtherm 3000 (19665) - Boiler not recognising demand for hot water in the Plumbing Jobs | The Job-board area at PlumbersForums.net

Similar plumbing topics

B
POTTERTON PROMAX 28 COMBI Boiler - Hot Water Issue
Hello, I am seeking some advice, I have a POTTERTON PROMAX 28 COMBI Boiler and I noticed yesterday that the water around the house is no longer warming up. The heat exchanger has been changed 6 months ago, so I do not believe it is that. Does anyone have any ideas on what it could be? Thanks
Replies
4
Views
212
oz-plumber
O
F
  • Question
No Hot water, Fixed and Broken Again Ideal Logic 24
Ideal Logic 24, Previous problem was that the hot water was only cold or barely warm if the heating was in use. If heating was off and boiler cold then would get hot water most of the time. Changing the flow cartridge about 2 years ago (when I moved in) solved this problem enough to suffer it as...
Replies
2
Views
90
Lou
Lou
M
Viessmann external flue run conundrum
Hi all. Hope you have all been keeping well. A while back I decided I only wanted to fit one brand of boiler and decided on Viessmann due to space for servicing and changing parts if ever needing to. I am finding my decision rather hard due to the different clearances on flue runs and cupboards...
Replies
9
Views
150
mutley racers
M
F
What constitutes a Commercial Appliance and thus a Commercial Kitchen?
We run a community village hall and have a large kitchen provided for the use of hirers. This includes a Lincat SLR9 gas cooker which I believe is a 23.8Kw appliance with all six burners and oven on max. This was installed some 10 years ago and has passed all subsequent Gas Safety inspections as...
Replies
4
Views
385
Timmy D
T
P
Repeated Airlock in Bathroom
Hi, Can anyone advise as to why the cold water to my bathroom keeps airlocking? This originally happened about 12 months ago and has happened 3-4 times since. It’s an upstairs bathroom, fed from a tank in the attic. The tank is about 8 Meters away and feeds a bath, sink and toilet. The tank...
Replies
9
Views
304
Chuck
C
Creating content since 2001. Untold Media.

Newest Plumbing Threads

Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock