Hot water only works when more than one hot tap turned on

[Luigi8888]

Completely baffled by this problem and hoping someone out there can shed some light. Moved into a new home 8 weeks ago, had boiler checked and everything seemed fine. As of yesterday we suddenly found we had no hot water. We have now discovered that we can still get instant hot water but only if a second source is activated. To give an example, switch the shower on and the water will run cold for days but also switch the hot tap on the sink on and both sources have instant hit water. This isn't an issue upstairs as there are a number of hot water taps in close proximity but having to run upstairs to turn a tap on so that we can get hot water from the kitchen taps is driving us crazy. The hot water light on the boiler will only switch on when a second source is activated no matter what we try. Any suggestions would be greatly appreciated.

 

[Aire]

When did you have the boiler checked? When you moved in or after you've discovered the problem?

 

[rpm]

So have I got this right?
Moved in 8 weeks back and all ok
Had boiler "checked" and all working ok
Then, yesterday you have this problem
So
What made you have boiler checked, was there any reason and when?

The more you say the easier it is for the guys & gals to help.

 

[Luigi8888]

So have I got this right?
Moved in 8 weeks back and all ok
Had boiler "checked" and all working ok
Then, yesterday you have this problem
So
What made you have boiler checked, was there any reason and when?

The more you say the easier it is for the guys & gals to help.

Friend is gas safe registered and looked over boiler and everything else in the house just as a favour as we wanted to know if we should replace it for efficiency . There were no issues before or after this. He is currently away for almost 3 weeks and don't want to bother him on holiday if I can help it. It's a baxi combi boiler. He worked out it was about 17 years old but he also spoke to baxi and they still supply part etc. and all was working fine so he advised not to prioritise switch out (We have a lot of work to do in the house). On that note, an electrician was working in the house the day the problem startered if that may be of relevance. Check took place when we moved in around 8 weeks ago. System has been perfect until now with hot water being almost instant. Let me know if There is Any other info I could provide.

 

[rpm]

Excellent and thanks. So the common denominator is the sparkie - How strange, wonder what he did?

 

[Aire]

Friend is gas safe registered and looked over boiler and everything else in the house just as a favour as we wanted to know if we should replace it for efficiency . There were no issues before or after this. He is currently away for almost 3 weeks and don't want to bother him on holiday if I can help it. It's a baxi combi boiler. He worked out it was about 17 years old but he also spoke to baxi and they still supply part etc. and all was working fine so he advised not to prioritise switch out (We have a lot of work to do in the house). On that note, an electrician was working in the house the day the problem startered if that may be of relevance. Check took place when we moved in around 8 weeks ago. System has been perfect until now with hot water being almost instant. Let me know if There is Any other info I could provide.

Sounds like a fault with an internal component which will need a gas safe engineer to diagnose and repair.

 

[Luigi8888]

Sounds like a fault with an internal component which will need a gas safe engineer to diagnose and repair.

Thanks. Just thought I'd best check to see if it was something obvious first. Will get someone to take a look then. Had a new boiler on a maybe list so might just bite be bullet now. Appreciate all of the replies guys. Especially on a Friday night. Thank you.

 

[rpm]

Would still go back to the sparkie as he may realise what he has done/ changed

 

[rpm]

Sounds like a fault with an internal component which will need a gas safe engineer to diagnose and repair.

Not going to dislike or disagree Craig but if sparkie is made aware he may realise he has altered something.

 

[Aire]

Thanks. Just thought I'd best check to see if it was something obvious first. Will get someone to take a look then. Had a new boiler on a maybe list so might just bite be bullet now. Appreciate all of the replies guys. Especially on a Friday night. Thank you.

If it's what I'm thinking of then it should be a relatively simple fix. It's not a fault I'd recommend changing the boiler over but that of course is up to you.