Boiler Breakdown Sticky

[Whyme]

Always handy to have..

 

[stevetheplumber]

before you start any fault finding check the three esentials
pressure
is there water in the boiler dont trust the guage whack half a bar in ive had many gauges reading 1bar when theres realy nothing in it
power
is there power to the boiler
gas
is there definatley gas at the boiler once spent 20 mins to find a fault and the the gas valve under the boiler was in the off position always best to crack a union or put a guage on

 

[Ermintrude]

before you start any fault finding check the three esentials
pressure
is there water in the boiler dont trust the guage whack half a bar in ive had many gauges reading 1bar when theres realy nothing in it
power
is there power to the boiler
gas
is there definatley gas at the boiler once spent 20 mins to find a fault and the the gas valve under the boiler was in the off position always best to crack a union or put a guage on

Had same on a duo tec , ages checking then thought would check outlet at meter ... 3mb

 

[Aquazone]

If you get a leak from the tube where flow turbine is on Greenstar, usually the adaptor behind the turbine has disintegrated.

If you can't get the temp to ramp to max on a Flexicom, then before getting multimeter out etc, take out and clean condense thoroughly. Trap, flush through HEX and check pipe is clear. Had this twice passed on from other company's unable to fix with thermistors. :thinking:

Intermittent ignition on a Solo/Promax. If it's on the new style all in one PCB then when it's lit, tap the PCB housing near yellow sticker. Can get it to drop out if PCB is at fault.

Glowworm CI, if you are getting PCB error as fault code (F13??) then check APS is not stuck on before fan has run, as it throws up PCB error.

 

[moogwai]

If you goto a intergas combi compact constantly going to 11 fault code, before checking sensors and harness.....remove and clean flow switch as debris can get on the paddle and make it stick in hot water mode.

 

[Billy Bob Bob]

if you have just removed on a service the burner and fan from a duotec HEA/gold/titanium/heatmax/promax combi and you get e133 error make sure you have fitted the silicone tube back to the manifold venturi and not the spare port

 

[moogwai]

If you goto an ecotec pro/plus that is starting up when switched on and display fades and the boiler conks out....check to see if pressure switch is the pink one and replace this first as it could be drawing all the power away from the rest of the boiler....had one yesterday.

 

[myles]

For gledhill pulsacoil 3 also check that the little float switch in header tank hasn't been broken off/that it makes a connection to send power to the board, no power will go to immersions if it is not making a connection.

 

[abc_plumb]

Biasi M96(24/28)SM/C2
Round black APS
boiler fires up for a few seconds then goes off, continues to spark. After a few attempts the lock out led comes on. Works when the combustion chamber is off.

check flue was fitted correctly as the white seal bends when pushing the elbow into the flue and doesn't sit right.
Fault only starts after the warrenty period is over 🙁
Remove the complete flue clean and pour water in the top of the boiler to clean out the heat exchanger. Done 3 of these in the past year.

 

[wards]

not always,had one yesterday and it was the p.c.b.

 

[dave1]

Biasi M96(24/28)SM/C2
Round black APS
boiler fires up for a few seconds then goes off, continues to spark. After a few attempts the lock out led comes on. Works when the combustion chamber is off.

check flue was fitted correctly as the white seal bends when pushing the elbow into the flue and doesn't sit right.
Fault only starts after the warrenty period is over 🙁
Remove the complete flue clean and pour water in the top of the boiler to clean out the heat exchanger. Done 3 of these in the past year.

Got one of these that displays aps fault mostly in ch mode. New aps fitted already, I'm going too go back and check flue and Venturi. Any other ideas?

 

[TFGplumbing]

Worcester Greenstar 28i Jr

If your customer is getting below/above average heat on the DHW hold fire on the PHE for a second & get out your thermometer & multimeter.

Check the resistance on the DHW NTC, for example I had a GS 28i JR that was not getting past 40C @ the DHW outlet the Kohms reading was out by 0.5

10C - 19.9 Kohms
20C - 12.3 Kohms
30C - 7.9 Kohms
40C - 5.2 Kohms
50C - 3.5 Kohms
60C - 2.4 Kohms
70C - 1.7 Kohms

 

[Geyser]

And check the diverter head hasn't been hanging off for three years since install(by someone else) and sending heat around rads everytime hot tap turned on. I was checking thermistors when valve head droped off.

 

[Captain.rick]

This is great stuff especially for newbies like me, thanks guys

 

[bright spark]

Here's 1 for commercial oil burners. I'd say Croppie's seen this. Have seen this happen a couple of times on Riello RL burners.
If the plant room door is open on a sunny day, sun shining in can make d burner go to lock out.
Photocell can pick up light shinning down boiler sight glass, say when boilers up to temperature, photocell picks up some light, the panel thinks there's a flame like a big lump of carbon on d head burning, and locks panel out.
You'll go out on call, Murphy's law it'll be a dull day and there'll b no apparent fault.

 

[Dotty]

Here's 1 for commercial oil burners. I'd say Croppie's seen this. Have seen this happen a couple of times on Riello RL burners.
If the plant room door is open on a sunny day, sun shining in can make d burner go to lock out.
Photocell can pick up light shinning down boiler sight glass, say when boilers up to temperature, photocell picks up some light, the panel thinks there's a flame like a big lump of carbon on d head burning, and locks panel out.
You'll go out on call, Murphy's law it'll be a dull day and there'll b no apparent fault.

Don't it throw you! Bit of insulating tape, job done.

 

[Ollieg]

Vaillant ecoTecs

If you have random unrelated intermittent faults.
Get a cuppa turn it on heating and watch the display. If the boiler flow temperature jumps around from say 55 to 62 and back in the blink of an eye the PCB needs replacing. It can take 5-10 min to start doing this.

Video on next post.

 

[Ollieg]

[DLMURL]https://vimeo.com/142146807[/DLMURL]
Here's a video.
It can be more subtle than this.

 

[gmartine]

Is it worth splitting this thread into separate manufacturers?

 

[Super Mario]

Yes too many diff models