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Once a gain thank you for you advise I went through Test "E" again this time, the burner would not ignite I then found I had no continuity on the green cable to the air pressure switch on ST16 The Fault was The control board I changed it and it has been working with no fault so far Because...

Hi Guys I carried out the checks on the pump and posted the readings as requested As I was waiting a reply I carried out the suggested check on the pump with the screwdriver The pump spindle spun freely I then took a leap of faith with the pump cap removed I started the CH the spindle was...

Check ST15 with pump off Reading 171.5 Ohms Checked for supply across on board to ST15 across blue and brown supply there

Thanks Rob the Rich Will do How do I check the power to the pump during heat demand Thanks for that update this seams to make sense Flash⚡️

Again thank you for all you advice I am very grateful But I am not sure what to do I agree that the air pressure switch may not be the problem and regards the pump I understand what you are saying about the DHW working normal because the water does not pass through it I have tried to check...

This started on Saturday, the heating and hot water was working fine Then the fault light came on, I reset it thinking the high winds had caused the problem This happen again on Sunday, Every time it locked out I Isolated the supply for about 30 mins, and the system fired up with no problem...

Hi guys thanks Yes the ha worked before I checked the pipes. I will check the pipes on the pump, and get back

I would like to thank you guys for your help, but I am still not sure what the fault is, are you saying it's the air pressure switch? Because I don't understand why the fan is running at full speed and didn't lock out when I only used hot water. The boiler only locks out when I put the heating...

Hi Andy So would you advise me to replace Air Pressure Switch.

Hi guy and thank you for you advice I removed the pipes and blew through them they were clear? Replaced Turned hot water on boiler fired up, water ran hot, turned hot water tap off, boiler shut down correctly. I then I switched the heater on and the following happened. 1. Fan ran at full...

Hi I am new today I would like to say hello to you all I have a engineering background and have worked in it for over 40 years I joined hoping I could help others and that others could help me I look forward to our new challenges I am also learning how to navigate my way round so I...

Hi Sock It's a 28i junior GC 4731170 I have carried out all the tests, boiler fires up then locks out and flash 4 times every second I am new and don't know my way round this site yet

carried test E and all checked out ok, but still locking out, Fault finding chart says investigate 1 sense tubes ? Where are they 2 pressure switch, How?