I have a problem with my Halstead Finest Gold boiler (natural gas) going into lockout which has been getting progressively worse for the last few months.
The problem initially only occured when DHW was switched on whilst the boiler was cold (CH off). If the CH was switched on whilst the boiler was cold, then lockout would not happen.
For a couple of months we just put the CH on about 5 minutes before we needed DHW and then no lock out would occur.
However, now the problem has started to affect CH also and we are finding that CH will also cause the boiler to lockout in the first few minutes after being switched on.
The problem does seem to be a bit random. Some days I can run a bath with maybe only one lockout and another day it may lockout 10 times whilst trying to run a bath.
Typically once the boiler has warmed up then the problem occurs a lot less.
I have been reading quite a few posts in the forums and as a result I have replaced the spark and detection electrodes and I also purchased a refurbished PCB from CET Ltd in Watford, but neither of these have had any affect on the problem.
I also checked the temperature of the DHW & CH flow pipes coming out of the boiler to check the diaphragm and this seems fine. When the boiler is cold and the DHW is switched on. The CH pipes remain cold whilst the DHW quickly gets hot.
I have no reason to suspect a problem with the gas pressure. The gas cooker for example works fine, but will definitely get a corgi guy in if this needs testing.
I have a multimeter, but am not aware of how to diagnose what is causing the lockout. I would certainly appreciate any information or guidance.
Thanks in advance
Richard
The problem initially only occured when DHW was switched on whilst the boiler was cold (CH off). If the CH was switched on whilst the boiler was cold, then lockout would not happen.
For a couple of months we just put the CH on about 5 minutes before we needed DHW and then no lock out would occur.
However, now the problem has started to affect CH also and we are finding that CH will also cause the boiler to lockout in the first few minutes after being switched on.
The problem does seem to be a bit random. Some days I can run a bath with maybe only one lockout and another day it may lockout 10 times whilst trying to run a bath.
Typically once the boiler has warmed up then the problem occurs a lot less.
I have been reading quite a few posts in the forums and as a result I have replaced the spark and detection electrodes and I also purchased a refurbished PCB from CET Ltd in Watford, but neither of these have had any affect on the problem.
I also checked the temperature of the DHW & CH flow pipes coming out of the boiler to check the diaphragm and this seems fine. When the boiler is cold and the DHW is switched on. The CH pipes remain cold whilst the DHW quickly gets hot.
I have no reason to suspect a problem with the gas pressure. The gas cooker for example works fine, but will definitely get a corgi guy in if this needs testing.
I have a multimeter, but am not aware of how to diagnose what is causing the lockout. I would certainly appreciate any information or guidance.
Thanks in advance
Richard