baxi 80e

[desrob]

if when checking the gas valve for correct operation,am i to check for 240v as the boiler goes through it's sequence,or with the power on and test for 240v as the boiler is idle,hope you understand at what i'm getting at

 

[lame plumber]

gas valve needs 240 to work no 240v no work, go purchase john reginalds book on combis or ch and it explains it all rather well

 

[desrob]

gas valve needs 240 to work no 240v no work, go purchase john reginalds book on combis or ch and it explains it all rather well

yes ,mi states ,check gas valve for 240 if 240 change gas valve

 

[lame plumber]

correct. so of the gas valve is getting a 240 supply and your not getting any gas out, the valves knackered, if your not getting 240 to the valve the pcb is faulty, having proved previously the aps is working

 

[desrob]

correct. so of the gas valve is getting a 240 supply and your not getting any gas out, the valves knackered, if your not getting 240 to the valve the pcb is faulty, having proved previously the aps is working

you get me... whats this jonny reggie all about a bit patronizing,

 

[dancinplumba]

reggae reggae reggae, jonny reggae reggae, jonny reggae reggae, lay on me

 

[lame plumber]

you get me... whats this jonny reggie all about a bit patronizing,

only trying to help answer a simple question that most gsrs find out fairly early on in life, thats patronising

 

[REDSAW]

he's asking you if you want to buy his. are you not john?

 

[buckley plumb]

if when checking the gas valve for correct operation,am i to check for 240v as the boiler goes through it's sequence,or with the power on and test for 240v as the boiler is idle,hope you understand at what i'm getting at

on the 80e check that silicon tube from the gas valve to the combustion chanber is not blocked or its sensor in the combustion chamber this can stop the main gas flow it is some form of equalibrium device .think it senses any press difference

 

[desrob]

only trying to help answer a simple question that most gsrs find out fairly early on in life, thats patronising

what that a device with a coil need to be energized ,if energized and not working, it must be faulty ....not necessary ,,,?because it's got power and not working does not mean it is broke...

 

[lame plumber]

what that a device with a coil need to be energized ,if energized and not working, it must be faulty ....not necessary ,,,?because it's got power and not working does not mean it is broke...

if you know this why the question?

 

[desrob]

if you know this why the question?

the question to be fair was a bit lame,but i was asking when to test,for correct operation,potterton resistance across the gas valve with the power off will tell you if ill or well,testing the baxi gas valve as it goes through it's sequence will not necessary do the same,can i test the baxi valve a

 

[lame plumber]

the question to be fair was a bit lame,but i was asking when to test,for correct operation,potterton resistance across the gas valve with the power off will tell you if ill or well,testing the baxi gas valve as it goes through it's sequence will not necessary do the same,can i test the baxi valve a

fair comment, to best of my limited knowledge, test for res as you describe on all older gas valves as you say,i test 105/80 for 240 once sequence is gone through and fan running etc proving aps etc ok and sparking occurring, if no gas then and screwdriver test/solenoid tester both fail gas valve needs binning. then i stick in my 2nd hand valve to keep custard happy till the new one arrives, cos u always seem to be ripping these trusty old boilers once they leak badly and most of the bits still work.

 

[buckley plumb]

sure you can only check for 240 at the board as the gas valve lead has a ac to dc converter built ito the gas valve plug end so dc at gas valve

 

[desrob]

fair comment, to best of my limited knowledge, test for res as you describe on all older gas valves as you say,i test 105/80 for 240 once sequence is gone through and fan running etc proving aps etc ok and sparking occurring, if no gas then and screwdriver test/solenoid tester both fail gas valve needs binning. then i stick in my 2nd hand valve to keep custard happy till the new one arrives, cos u always seem to be ripping these trusty old boilers once they leak badly and most of the bits still work.

i put my second hand valve and still no gas

 

[desrob]

sure you can only check for 240 at the board as the gas valve lead has a ac to dc converter built ito the gas valve plug end so dc at gas valve

thank you

 

[desrob]

just had a call from customer the boilers flame failure light is flashing again,i changed the gas valve this made no difference flame failure still flashing,i put the original gas valve back on blew through sensing tube checked for blockages etc the boiler fired up,but it did not modulate on ch it was burning high it would get to temp knock off then fire again for about ten seconds ,all sensor are fine

 

[desrob]

just had a call from customer the boilers flame failure light is flashing again,i changed the gas valve this made no difference flame failure still flashing,i put the original gas valve back on blew through sensing tube checked for blockages etc the boiler fired up,but it did not modulate on ch it was burning high it would get to temp knock off then fire again for about ten seconds ,all sensor are fine

every thing seems fine ,i have 240 to gas valve so that indicates it's the valve but it isn't,,i'm at a loss it's one of these strange faults that you get from time to time,the thing is finding what puts it right and believe me i have tried. any one came across anything similar

 

[buckley plumb]

what lights are comming on when it fails and does it fail on hw and htg and how often

 

[Nostrum]

you have to think like a boiler. What's telling the boiler to modulate (or not in this case)?

 

[gasmanrob]

you have to think like a boiler. What's telling the boiler to modulate (or not in this case)?

"to beat the problem you must become one with the problem"

 

[Nostrum]

I like it :39:

 

[buckley plumb]

Voltage at main PCB - M4 connector is:
approx 70 - 140V DC across terminals 23 & 24
approx 20 - 70V DC across terminals 21 & 22
Min burner pressure approx 14 mA DC across
terminals 21 & 22
Max burner pressure approx 35 mA DC across
terminals 21 & 22

have you checked these voltages to the gas valve from pcb think 23 and 24 oar main solenoid and 21 and 22 modulating wires . gas valve is dc not ac

 

[lame plumber]

gas valve needs 240 to work no 240v no work, go purchase john reginalds book on combis or ch and it explains it all rather well

being thick and to many malts, thinking 240 for fan , if you get 240 at gavalve, pcb is **** hence the fault finding guide. apologies, must stop the single malts

the other 2nd hand item to wang in now is you pcb if you got one or test all the terminals shown in the earlier post, i botch it and bung the pcb in at this stage, its easier!

 

[desrob]

Voltage at main PCB - M4 connector is:
approx 70 - 140V DC across terminals 23 & 24
approx 20 - 70V DC across terminals 21 & 22
Min burner pressure approx 14 mA DC across
terminals 21 & 22
Max burner pressure approx 35 mA DC across
terminals 21 & 22

have you checked these voltages to the gas valve from pcb think 23 and 24 oar main solenoid and 21 and 22 modulating wires . gas valve is dc not ac

where did you terminai numbers etc