It started with periodic lockouts which now happen daily. It didn't
always ignite after resetting so started to do it at the spur. Even
then it sometimes took a while to reset. This was accompanied by very
very hot water, way though the cylinder stat was set at 50 degrees.
The boiler did not respond to adjustments to the room thermostat also.

I have replaced PCB (with a new one!), air pressure switch, 3-port
motorised valve, room and cylinder stats.

I now have daily lockouts, the water is still piping hot and the
boiler now has a mind of its own. It comes on when the timer controls
indicate it shouldn't and goes off when it feels like it.

I was wondering if the behaviour of my boiler was/is consistent with a
dodgy temperature sensor and/or overheat stat?

Am I also right in thinking that if the DHW or CH are meant to be 'On'
through the timer than I should have a green light (either flashing or
permanent)on the boiler.

Thanks in advance

Dave

In message , Dave
writes
It started with periodic lockouts which now happen daily. It didn't
always ignite after resetting so started to do it at the spur. Even
then it sometimes took a while to reset. This was accompanied by very
very hot water, way though the cylinder stat was set at 50 degrees.
The boiler did not respond to adjustments to the room thermostat also.

I have replaced PCB (with a new one!), air pressure switch, 3-port
motorised valve, room and cylinder stats.

I now have daily lockouts, the water is still piping hot and the
boiler now has a mind of its own. It comes on when the timer controls
indicate it shouldn't and goes off when it feels like it.

I was wondering if the behaviour of my boiler was/is consistent with a
dodgy temperature sensor and/or overheat stat?

Am I also right in thinking that if the DHW or CH are meant to be 'On'
through the timer than I should have a green light (either flashing or
permanent)on the boiler.

It must be all that e-m radiation around there



You probably have a defective temperature sensor or a defective new pcb.

A flashing red LED in lockout generally indicates a board fault, a
constant red LED, an external to board fault.

There is a table in the installation manual which explains what the
indicators represent
--
geoff

On Wed, 31 Dec 2003 15:05:07 +0000, geoff wrote:

In message , Dave
writes
It started with periodic lockouts which now happen daily. It didn't
always ignite after resetting so started to do it at the spur. Even
then it sometimes took a while to reset. This was accompanied by very
very hot water, way though the cylinder stat was set at 50 degrees.
The boiler did not respond to adjustments to the room thermostat also.

I have replaced PCB (with a new one!), air pressure switch, 3-port
motorised valve, room and cylinder stats.

I now have daily lockouts, the water is still piping hot and the
boiler now has a mind of its own. It comes on when the timer controls
indicate it shouldn't and goes off when it feels like it.

I was wondering if the behaviour of my boiler was/is consistent with a
dodgy temperature sensor and/or overheat stat?

Am I also right in thinking that if the DHW or CH are meant to be 'On'
through the timer than I should have a green light (either flashing or
permanent)on the boiler.

It must be all that e-m radiation around there



You probably have a defective temperature sensor or a defective new pcb.

A flashing red LED in lockout generally indicates a board fault, a
constant red LED, an external to board fault.

There is a table in the installation manual which explains what the
indicators represent

OFF the top of my head, steady green is demand+flame on, flashing green is
demand+noflame.

Nice to know that one of the controls managed to cut the gas eventually ?!?

--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html

"Ed Sirett" wrote in message on.co.uk...
On Wed, 31 Dec 2003 15:05:07 +0000, geoff wrote:

In message , Dave
writes
It started with periodic lockouts which now happen daily. It didn't
always ignite after resetting so started to do it at the spur. Even
then it sometimes took a while to reset. This was accompanied by very
very hot water, way though the cylinder stat was set at 50 degrees.
The boiler did not respond to adjustments to the room thermostat also.

I have replaced PCB (with a new one!), air pressure switch, 3-port
motorised valve, room and cylinder stats.

I now have daily lockouts, the water is still piping hot and the
boiler now has a mind of its own. It comes on when the timer controls
indicate it shouldn't and goes off when it feels like it.

I was wondering if the behaviour of my boiler was/is consistent with a
dodgy temperature sensor and/or overheat stat?

Am I also right in thinking that if the DHW or CH are meant to be 'On'
through the timer than I should have a green light (either flashing or
permanent)on the boiler.

It must be all that e-m radiation around there



You probably have a defective temperature sensor or a defective new pcb.

A flashing red LED in lockout generally indicates a board fault, a
constant red LED, an external to board fault.

There is a table in the installation manual which explains what the
indicators represent

OFF the top of my head, steady green is demand+flame on, flashing green is
demand+noflame.

Nice to know that one of the controls managed to cut the gas eventually ?!?

Thanks for the replies Geoff/Ed

I know this bolier has a reputation for dodgy PCB's but before the new
one got fitted, a reconditioned one had been fitted a few days earlier
and neither fixed the problem. I'm hopeful that the new temperature
sensor will do the business. I'm under contract so they will be
coming round next week to sort it out. I'm just trying, with your
sound advice, to get a better understanding
of how things are meant to work.

I've looked at the User Guide with regard to the LED indicators and a
permanent red light without any green is classed as 'Mains ON Only.'
I have noticed this condition when either of the timer controls is set
to 'ON,' which I believe shouldn't be the case. However, that seems
consistent with the boiler coming on, and staying on, when the timer
is set to off! Last night I had to switch it off at the spur when
room temperature reached 29 degrees!

Thanks again.

Dave

In message , Dave
writes
"Ed Sirett" wrote in message
mon.co.uk

I've looked at the User Guide with regard to the LED indicators and a
permanent red light without any green is classed as 'Mains ON Only.'

Maybe I should clarify - Red LED in the lockout condition

I have noticed this condition when either of the timer controls is set
to 'ON,' which I believe shouldn't be the case. However, that seems
consistent with the boiler coming on, and staying on, when the timer
is set to off! Last night I had to switch it off at the spur when
room temperature reached 29 degrees!

Thanks again.

Dave

--
geoff

In message , David Hemmings
writes
On Sat, 3 Jan 2004 00:34:24 +0000, geoff wrote:

In message , Dave
writes
"Ed Sirett" wrote in message
news:pan.2003.12.31.17.18.14.940622@makewrite. demon.co.uk

I've looked at the User Guide with regard to the LED indicators and a
permanent red light without any green is classed as 'Mains ON Only.'

Maybe I should clarify - Red LED in the lockout condition

I have noticed this condition when either of the timer controls is set
to 'ON,' which I believe shouldn't be the case. However, that seems
consistent with the boiler coming on, and staying on, when the timer
is set to off! Last night I had to switch it off at the spur when
room temperature reached 29 degrees!

Thanks again.

Dave

Am waiting for you to reopen on the 5th so i can change the pcb for my
'60'.

Mmm, holidays, nice ...


Do you send out in advance ?

Yes, Get in early, I'm sure demand will outstrip supply on Monday

As currently i can keep the boiler going
by periodically resetting it, which is getting even more frequent of
late. Several days without heating will go down badly with the better
half.

Special delivery with £... insurance ok to send back pcb ?

Registered shgould be OK


On another note. I cannot remember if i replied a while back, but i
did actually find my user manual, quite unusually it was when i was
removing the old loft insulation and replacing with new that the
booklet was uncovered a long way from any pipeworks that the
installers fitted in the loft.

Bloody mice

--
geoff