My hot water is luke warm and not hot enough

[awm]

Hi all, not sure if it's relevant to my previous issue here...

//www.diynot.com/forums/plumbing/shower-keeps-going-hot-and-cold.409542/#3270059

but now all of my dials are turned to the maximum but my hot water is coming out lukewarm and is not as hot as it should be.

Any ideas? Is it caused by the cold weather?

Thanks!


Alex

 

[StudWall]

We need a bit more info

Combi boiler or tanked system?
Hot water lacking from taps or shower or both?
Type of shower?

 

[ALCPlumbing]

Does the boiler stay lit whilst you have a hot tap running?

 

[awm]

Hi, it's a Vaillant combi boiler.

And yes the flame stays on while the hot tap is running.

The water is luke warm on all taps in the flat - shower, bathroom and kitchen.

I'm not sure if it affects anything but the temperature gage on the boiler reads 60°C and the pressure 1.5?

Here is an image of the shower

Untitled

• awm
• 19 Jan 2013
• 2

Thanks, really appreciate your help!

 

[HootingOwl]

If you reduce the flow of hot water from the tap does the water get hotter?

Picture of boiler would help. Possibly diverter valve letting by on boiler or restriction inside boiler.

 

[awm]

Hi yes when I reduce the flow of hot water it works!!!

Thanks!!!

What does this mean?

Here is the boiler...

Untitled

• awm
• 13 Aug 2014
• 2

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[HootingOwl]

Turbomax. Lovely.

When you turn on a hot tap, does the light on the boiler with a tap symbol come on?

My guess is diverter valve passing. Good boiler. Worth repairing.

 

[awm]

Hi, yes the tap light comes on when I run the hot water.

I had a new diverter valve fitted in March this year, along with some "pipework", all done by a plumber recommended by a friend...

Untitled

• awm
• 17 Dec 2014
• 1

Any further thoughts?

 

[HootingOwl]

Do a gas rate on it. Google for instructions. It may be working perfectly and struggling in the cold weather

 

[HootingOwl]

Do a gas rate on it. Google for instructions. It may be working perfectly and struggling in the cold weathrer

 

[awm]

Hi, sorry what do you mean by gas rate? Can you send me a link?

The guy who fitted the diverter valve thinks I should descale the boiler, what do you think? Any idea of how I could do that?

Thanks,


Alex

 

[HootingOwl]

Turn off all gas appliances except the boiler. Run hot water at full output. At gas meter record the amount of gas used over a 2 minute period if it is a digital meter, or if a dial type meter how long it takes for one revolution of the dial. Turn off hot water.
You now know how much gas is being used by the boiler. Compare this to the specification in the manual. Is it the same or similar?

 

[awm]

Turn off all gas appliances except the boiler. Run hot water at full output. At gas meter record the amount of gas used over a 2 minute period if it is a digital meter, or if a dial type meter how long it takes for one revolution of the dial. Turn off hot water.
You now know how much gas is being used by the boiler. Compare this to the specification in the manual. Is it the same or similar?

Okay thanks, here is footage of my gas rate check...

http://www.alex.mastersofcreation.com/IMG_5376.mp4

Which manual should I compare this with? I don't think I have it!

What do you think after seeing this? This is 2 minutes with the hot water turned on full.

Thanks.

 

[awm]

Hi, anyone got any suggestions on this as I'm getting tenants in soon and would like to get it fixed.

Thanks

 

[Gasguru]

It's coming out at 31 Kw Gross which is more of less fine.

Time to test the diverter....

With the left hand side flow pipe to the radiators cold open the hot tap. Feel the pipe say 300mm down from the boiler...does it get appreciably hot?