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Gas boilers I have a classic FF240 combi boiler. Heating seems to be on all the time even when timer is off. Is there a simple solution to this?

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Your ch zone valve is seized with rust and jammed in the on position. get it replaced and a chemical flush at the least

Posted on Oct 16, 2014

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The contacts in the heat relay may be stuck closed

Posted on Mar 29, 2014

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Posted on Jan 02, 2017

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My central heating turns off when i turn the hot water tap on. when i turn it off the central heating doesn't come back back on until i turn the power off and on.


Combi-boiler-turn hot water tap on/off and the heating stops for ...

singletrackworld.com/.../combi-boiler-turn-hot-water-tap-onoff-and-the-...
Combi-boiler-turn hot water tap on/off and the heating stops for 20secs ... hot watertakes priority over central heating so when you run the hot tap, heating is ... Yeah onmy worcester combi there is a diverter valve - it feeds either the heating or ...

My central heating works but I have no hot water - 24'7 ...

https://www.247homerescue.co.uk/my-central-heating-works-but-i-have-...
Diverter valves switch heat between the hot water and the central heating. When youturn your hot tap on, the diverter valve temporarily shuts off the water supply ...

Does your boiler keep switching itself off? Here's why ...

www.dhs-uk.com/does-your-boiler-keep-switching-itself-off-heres-why/
Jul 7, 2015 - ... Bathroom Suites, - Showers, - Wet Rooms, - Taps and Accessories, Information and ... Low water pressure can cause your boiler to turn itself off. ... boiler is not turning off, you aren't getting the amount of hot water you require. ... If there is air in your central heating system, then your boiler may shut down.

Feb 09, 2016 | Water Water Heaters

2 Answers

After moving my gas meter from inside the home to outside and having a semi concealed meter connected we cant get the combi boiler to work properly we can get hot water and have the gas fire on but


your boiler needs a minimum gas pressure of 16 mb to light successfully. if your gas pipe has been extended it has to be able to flow enough gas. it may need upgrading to 28mm for even as little as a metre from the gas meter. if your central heating works ok when the fire is off then this is your problem

Oct 12, 2014 | Water Heaters

1 Answer

I am wanting to wire a Baxi 105E boiler to a Danfoss 102 mechanical timer. The boiler has 5 wires = red, blue, earth, black and yellow. The Timer has six terminals = 1 DHW, 2 HTG, 3 COM, I (earth), 5...


1) Contact baxi:
http://www.baxi.co.uk/contact.htm

2) Which boiler wires? I don't know. Page 24 manual.
Manual says to disconnect link between terminals 1 and 2, and instert timer in-line.
http://www.acwilgar.co.uk/Boiler-Manual-PDF/Baxi/Combi%20instant%2080E%20&%20105E.pdf

2) I can tell you about the timer wiring.
Timer is 230Volts
Not sure if you have British Hot-Neutral 230Volt, or Hot-Hot 230Volt.
Wiring is same 2 wires, but words to describe are different.
Let's say you have Hot-Neutral 230V
Connect Hot to L6
Connect Neutral to N5
This will power the timer so it runs and keeps time.
You can get Hot-Neutral wires from Hot-Neutral that arrive to power the boiler.

Now the timer terminals are separate.
E terminal is Earth or ground.
The Common is Hot wire.
The timer then turns on-off and switches back and forth between DHW and HTG.
HTG is heating
DHW is defrost.
Timer has 2 sets contacts.

When timer activates first set of contacts, then DHW defrost terminal receives power from Hot wire on Com terminal. At this time, all power is cut to HTG heating terminal.

When the defrost cycle ends, then the heating circuit receives power, and then the timer has programming that opens and closes a second set of contacts going to HTG heating terminal.

Which wires from boiler connect to each terminal, I am not sure.

Feb 03, 2013 | Hardware & Accessories

1 Answer

I have worcester combi boiler 24CDI RSF, the boiler will not ignite, for the hot water or the central heating, it was working ok, and the red water light is flashing


i think the fan may be stuck. you will need to gain access to the internals of the boiler so a gas safe engineer will need to be employed to do it. if it is the fan, a simple squirt of lubricant will free it and give you anything from a week to a year of trouble free operation but! you will need to get a new fan. Fit a new one as soon as you can as they tend to go at the worst possible time if you dont

Oct 20, 2011 | Combi Centre DX - Mango

1 Answer

My worcester 240 combi boiler. when heating goes on after few mins it starts to go off and on at the boiler with a clicking sound, and boiler kicks in to light up and go off at same time. any help please


check the water pressure on the combi could be low or in the back of your manuel there is a fault finding guide which is very good and simple to follow .

Oct 02, 2010 | Heating & Cooling

2 Answers

Central Heating\which combi boiler?


HI right first i would look at a worcester greenstar combl
best you can get and you have full back up from worcester leave all rads with stats as they are i think you will have to remove one , the that would be the bath room also the greenstar comes with a clock bulit in these are on the worcester bosch web site i have been a gas fitter fot 30 years and this what i would go with a really good combi, you can also get awire less room thermostat for this hope this helps

Feb 01, 2010 | Desa International CBN30T Central Heating...

1 Answer

Vaillant 831 combi boiler timer help


check to see the time clock is set with the clock symbol. there are three settings on analog clocks I , O and clock the I setting is constant running, the O setting is off and the clock setting is timer.
also try setting the thermostat up higher to see if the boiler fires.

Mar 25, 2009 | Water Heaters

1 Answer

Repressurizing my boiler


take your pick from video or text

How to Repressurise a Heating System with an Internal Filling Key ...

? 3:30
https://www.youtube.com/watch?v=zUsBw1ZpiKY
Oct 27, 2010 - Uploaded by Worcester, Bosch Group
This video shows you how to repressurise your heating system using your Greenstar gas boiler's internal ...

Repressurise Worcester boiler - YouTube

? 4:12
https://www.youtube.com/watch?v=K6fH4XfGgxo Nov 10, 2012 - Uploaded by Rory Macfarlane
This video demonstrates how to repressurise a Worcester combi boiler on the.

Product Troubleshooting Videos ' Worcester, Bosch Group

https://www.worcester-bosch.co.uk > Support > Troubleshooting > Videos How to repressurise a heating system with an internal filling key ... how to repressurise your heating system using your Greenstar gas boiler's internal filling key.

How to top your Worcester combi boiler up - Gas Care.

www.gascare-heating.co.uk/topping-pressure-worcester-bosch-combination-boiler/ Aug 4, 2014 - If the needle on the pressure gauge on your boiler has gone into the red or down to zero it means there is little or no pressure left in the heating system and it needs to be topped up ASAP. So here's Gas Care Swansea's guide to refilling your Worcester Bosch combination boiler through the internal filling link.

How do I re-pressurise my Worcester Bosch boiler? - My Plumber

www.my-plumber.co.uk/blog/how-do-i-re-pressurise-my-worcester-bosch-boiler/ Sep 1, 2015 - 6) Check the pressure on the pressure gauge. When it reaches between 1 and 1.5 bar, it is time to turn the white knob back to the right to close the valve. Be very careful not to over-tighten. 7) Turn the filling key to the left until the arrow lines up with the open padlock and remove the key.
Repressurise Worcester boiler

May 12, 2017 | Heating & Cooling

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