N
NotBuyingIdeal
Hi All
I know I know ... another HE24 LF code problem. Fix is replace boiler ;-)
My problem is slightly different to other posts I've been reading in that the boiler works fine for 95% of the time. It will often go a few days then we get the LF code. We hit reset and it always always re-lights. It will LF at all times of the day or night ( when running ;-) . No real pattern to it.
My plumber has replaced most of the bits on the boiler and every time we think it's sorted but it then returns.
We've even setup a CCTV camera to film the bolier which is in the attic ! That way we can easily check if it's LF'ing.
We can also play back the point when the problem occurs. This is the sequence of events
'0' when no demand.
'c' and solid white LED - heating on/water heating.
then it will go wrong........
'c' and flashing white LED for a few minutes
'LF' and flashing white LED for a few minutes
'LF' and no LED until reset where boiler will relight and run fine.
Happy to post it happening on youtube if that will help. There's no sound but it DOESN'T appear to be trying to relight 3 times etc.
it's a heat only boiler, its on the attic level and heats that floor and the floor below ( 6 rads / 3 towel rails in total ) and 2 x 120L hot water tanks. Open vented system. External pump.
So what's been replaced / checked?
Condensate trap is clear
Condensate pipework is clear ( we actually ran boiler into a bucket for a few days )
Flame sensor
Flame sensor cable ( insulation had broken down - we through this was the smoking gun )
Spark generator and spark electrode
Fan
Insulation in combustion chamber ( was in a bad way )
Earth pins in combustion chamber
External pump ( this seemed to be working fine anyway ) - Circulation seems good.
Sump cleaned multiple times
New PCB multiple times
Gasket set
We've had it power flushed. We had a long period after the flush/drain/refill where the system was stable. System treated with X100/200.
The flush/drain/refill also cured it of a moaning noise it use to make.
Which areas haven't we looked at ?
Gas Pressure - we actually have another boiler downstairs in the basement. For a while we suspected the other boiler was robbing the ideal of gas pressure but after changing the timing controls to make sure they weren't trying to fire up at the same time. LF problem doesn't seem to co-inside with the use of other gas appliances in the house.
We also had alot of new houses built near by. Could the pressure to our house be an issue ?
Gas Valve - Plumber happy to swap this but he's saying probably isn't the problem as it's working most of the time.
Are there any other ideas out there that we could consider ? or is it simply that the boiler just flames-out now and again because it's just sh*t ?
Thanks in advance.
I know I know ... another HE24 LF code problem. Fix is replace boiler ;-)
My problem is slightly different to other posts I've been reading in that the boiler works fine for 95% of the time. It will often go a few days then we get the LF code. We hit reset and it always always re-lights. It will LF at all times of the day or night ( when running ;-) . No real pattern to it.
My plumber has replaced most of the bits on the boiler and every time we think it's sorted but it then returns.
We've even setup a CCTV camera to film the bolier which is in the attic ! That way we can easily check if it's LF'ing.
We can also play back the point when the problem occurs. This is the sequence of events
'0' when no demand.
'c' and solid white LED - heating on/water heating.
then it will go wrong........
'c' and flashing white LED for a few minutes
'LF' and flashing white LED for a few minutes
'LF' and no LED until reset where boiler will relight and run fine.
Happy to post it happening on youtube if that will help. There's no sound but it DOESN'T appear to be trying to relight 3 times etc.
it's a heat only boiler, its on the attic level and heats that floor and the floor below ( 6 rads / 3 towel rails in total ) and 2 x 120L hot water tanks. Open vented system. External pump.
So what's been replaced / checked?
Condensate trap is clear
Condensate pipework is clear ( we actually ran boiler into a bucket for a few days )
Flame sensor
Flame sensor cable ( insulation had broken down - we through this was the smoking gun )
Spark generator and spark electrode
Fan
Insulation in combustion chamber ( was in a bad way )
Earth pins in combustion chamber
External pump ( this seemed to be working fine anyway ) - Circulation seems good.
Sump cleaned multiple times
New PCB multiple times
Gasket set
We've had it power flushed. We had a long period after the flush/drain/refill where the system was stable. System treated with X100/200.
The flush/drain/refill also cured it of a moaning noise it use to make.
Which areas haven't we looked at ?
Gas Pressure - we actually have another boiler downstairs in the basement. For a while we suspected the other boiler was robbing the ideal of gas pressure but after changing the timing controls to make sure they weren't trying to fire up at the same time. LF problem doesn't seem to co-inside with the use of other gas appliances in the house.
We also had alot of new houses built near by. Could the pressure to our house be an issue ?
Gas Valve - Plumber happy to swap this but he's saying probably isn't the problem as it's working most of the time.
Are there any other ideas out there that we could consider ? or is it simply that the boiler just flames-out now and again because it's just sh*t ?
Thanks in advance.