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My logic 30 combo boiler has hot water but no heating any advice

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Check water pressure in system , bleed air in rads check and see if pump is working

Posted on Dec 07, 2016

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Posted on Jan 02, 2017

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I got htp boiler combo the boiler make domestic hot water and no heat, termostat good relay good,any parts got be replace.


If you have replaced all parts of the boiler, then there is a water leak somewhere in the system. This applies to flow water heaters. Water does not get warm up then. Perhaps the burner was blown, if you did not check it.

Nov 01, 2017 | Water Water Heaters

1 Answer

My ideal logic combi 30+ is saying ignition lockout and my radiatiors arent heating up as well as my water not turning hot. How can i fix this please?


Lockout is a safety feature. Usually a latching condition and needs to be investigated rather than blindly reset. (The Combi has a bit more intelligence.) With the ignition locked out, you can't hi-fire the boiler, so no hot water of either type. The 'L' should also show a code number - check your user manual (google) for more guidance.

I've had a lockout on a non-combi: it was caused by lack of circulation of central heating water through the boiler.... The system boiled and the trip tripped. The pump WAS running, but wear in a valve actuator resulted in the valve feedback saying valve open while it was physically shut.

Dec 31, 2016 | Water Water Heaters

1 Answer

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

1 Answer

Hi I have a problem with my valiant combo boiler making aeroplane noises when heating comes on and i turn on the hot water. It's only started doing this so can some body help.


You don't say what model your boiler is but if its one of the older types in my experience its caused by the built in bye-pass and would require changing it to overcome the noise you describe which is what most customers describe. You can prove it by turning the central heating valve of on the flow side of the boiler momentarily you will hear the noise stop then quickly turn it back on, it often helps to you replace with new one.

May 01, 2015 | Water Heaters

1 Answer

Water to hot for gas boiler boiler gos off


It could be dyslexia, but I think you want to know what may be wrong with your boiler in this case!
This is a VERY old design. The diaphragm is on the water section, this operates a switch to turn ON the pump, and a further device causes the diverter valve to divert boiler water from CH duty to HW duty.
From your description it appears that the boiler is shutting down on internal boiler water temperature (too high), your 'briefly too hot' HW symptom may be caused either by the boiler side of the secondary heat exchanger being blocked/caked in sludge, OR the DHW side of it being scaled. Either way a new or replacement (descaled) secondary heat exchanger MAY inprove things. It's not easy on these old clunk-pots, and EVERY disturbed seal will subsequently leak, so get a good supply of o-rings and fibre seals before you start ("you" being the competant fitter you employ)

Dec 20, 2012 | Water Heaters

2 Answers

Problem with hot water from Vokera Excell 80sp boiler


Hi - hope someone can help. I have a VOKERA EXCEL 80SP combi boiler and been without hot water/central heating for two days. The pilot light is on, the fan is on, but boiler not triggering once the hot water tap is turned on.
Hopefully someone come to look at it today but hoping for some advice. Anyone else had this problem?
Thank you.

Dec 21, 2009 | Water Heaters

2 Answers

Alpha 240e boiler wont fire up for hot water, will for heating


most likely the diverter valve.. when hot tap turned on the movement of the water through the valve operates a diaphragm which pushes a pin/button//switch to tell the boiler to fire up

Aug 21, 2009 | Water Heaters

1 Answer

Central heating and hot water have suddenly stopped working


not an engineer but maybe a heating compant,, it sounds like you have a relay that has gone bad, you have what we call a winter summer system your domestic water comes from a tank inside the boiler, you might want to think about splitting the system to save you some money in the long run, seperate the water heater from the boiler so you only heat up in the winter, right now you are heating the system that heats your house to get 30 or 40 gals of domestic hot water, it would cost you less by seperating them

May 17, 2009 | Water Heaters

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