Any plumbers on SD I have a heating & water issue - They've stopped working!

stratts

Well-Known Member
#1
Quick brief - Hot water and central heating won't send a signal to the boiler to turn it on!! The pump runs and the controller lights are on but the boiler won't ignite. Have had a new controller in the airing cupboard and circuit board in the boiler fairly recently.

Can a faulty actuator stop the signals being sent to the boiler? For a while the pump over-run hasn't stopped after they've been turned off so I've had to turn it off at the mains but today it's stopped working altogether,

Cheers

Stratts
 

deerstalker.308

Well-Known Member
#2
Is it frozen with you there? We had similar in cold weather when the condensation outlet pipe froze solid, stopped the boiler all together, chap came out, asked me to boil the kettle, poured it over pipe, problem solved..?
 

rick6point5

Well-Known Member
#3
many combi boilers will fail to start if internal pressure falls below .4 bar, this is easily rectified by refilling to recommended pressure with filling loop.
 

Tommo

Well-Known Member
#4
many combi boilers will fail to start if internal pressure falls below .4 bar, this is easily rectified by refilling to recommended pressure with filling loop.
if fitted with a pressure vessel it wont drop below its factory pre-set pressure, meaning it should always be at least .4/5 bar, that is unless the pressure vessel has a hole or has perished its diaphragm. In which case it wont hold pressure, then over-pressure and bliw out of the expansion.

is the boiler on lock-out, more importantly what sort of boiler is it, and whats your system design ie combi (no hot/cold water tanks or gravity fed (with tanks)?!

t
 

roedeerred

Well-Known Member
#6
I would suggest you look for the zone valve /3port diverter valve some call them they are prone to getting stiff and burning the motor out then block all signals to the boiler they can be operated manually which may free up things and allow your boiler to restart.
you can change the motor head only (but I find they burn motors out regulary) it mean draining the system to replace the whole thing but I think its worthwhile.

45 years in building trades. actually doing one tomorrow.
 
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stratts

Well-Known Member
#7
If all fails breakout a onesie.

K
I don't need boiler failure to break out the onesie!! Mrs Stratts starts a new job tmoro morning she wanted a nice relaxing bath and get her head right, instead she's driven to my parents for a shower and got the hump, lol!!

It's not a combi and yes it's been freezing but I doubt that's the issue as we've had it a lot colder without problems. It's not been right for a while and in true man fashion I've left it alone!!
 

roedeerred

Well-Known Member
#9
is it the drayton with a white/grey cover look on the side for safety catch like lever move it to mid position then wait a minute see if boiler starts
 

Yorkshire lad

Well-Known Member
#11
First what kind of boiler is it. I'm thinking it's not a combi because it wouldn't have the 2/3 port valves and pump external. Pm me if you want I'm a heating engineer.
 

duke5339

Well-Known Member
#12
Hi it sounds like the boiler thinks it is up to temp, hence the pump running continuously.
It could be the auto bypass nor allowing the water to circulate to loose heat when the valves shut.

First thing is you should have a immersion heater fitted to the tank, this will sort out the water side.
The next thing is to call a Gassafe engineer to find the cause.
Please check they are gassafe as they will stand by there work.
Regards Marcus
 
#13
I would suggest you look for the zone valve /3port diverter valve some call them they are prone to getting stiff and burning the motor out then block all signals to the boiler they can be operated manually which may free up things and allow your boiler to restart.
you can change the motor head only (but I find they burn motors out regulary) it mean draining the system to replace the whole thing but I think its worthwhile.

45 years in building trades. actually doing one tomorrow.
Ditto

Mine did the same last year.....I served my time in the 80s then left the trade but after a bit of head scratching realised what was wrong and replaced the zone valve....instant results when initiated again
 

stratts

Well-Known Member
#15
Get a bigger hammer
I tried wacking it but this time it didn't work!! Thanks for all the advice and PM's, I got the emursion heater working (blown fuse!) so we have hot water and have a plumber coming over to replace the valve as I'm sure that's the problem now,

Cheers

Stratts
 

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