Red fault light on, then another issue but all sorted thanks to info on this site

I promise I have searched the site but I cant find an answer to my issue...

I have a flat where the tenants moved out last week, as there was a small delay in them leaving and us taking the meter readings (one day) they turned all the heaters and boiler off. My Partner and I have been to clean the flat this weekend so we turned the boiler on with the immersion heater. To start with there was loads of hot water and a perfect temp and then it all went cold. I checked the boiler and the red fault light was on, the green light was off and the light on the pcb is off.

I have checked for a reset button but I cant find one anywhere on this unit, where would it be? I have checked the pcb and there is no button there and the manual reset thermostat just turns and turns..

We turned the unit off over night and I went back this morning, so it had been off for over 18 hours, the unit is still very warm but when I turn the power back on the red light immediately comes on.

Would love to know where this reset button is (the unit is about 6 years old) or anyones thoughts..

Cheers
Dave

I've continued reading other threads and may it be that I have the new style rod thermostats and the reset button is underneath the black covers? Does anyone know at what year they introduced these? I think I bought the property in 2002/03 and it was new then...

If so would the Red fault light only be on, no green light, no flashing red light on the pcb...

Sorry to be such a pain!!

Firstly this site is ace, after spending some time reading I have been back to the flat...

1) Header take was empty and not connected to the mains, so with the use of a pan borrowed from a neighbour I was about to fill this to just above the line on the tank - I decided to do a little more to allow for the empty pipes....

2) I found the reset switch!! I didnt realise it was underneath the black cap and once I unscrewed that I found the brown pin with a cross on it. This was out so I pushed that back in.

Turned the power back on with the booster and it immediately started to make the familiar noise of it warming water. Happy days I thought... Except I cant get any hot water out of the taps but I know it is warming the water up.

The lights are as follows, Red fault light off, Green light on, PCB LED is not flashing at all..

Does anyone have an idea what is wrong now and what my next move should be, the manual says Unit Dead - I think this is bad....

Might be worth mentioning that the boiler is in Colchester Essex, not sure if Mike covers this area as you say North London, if you think I need someone is there any one who can be recommended in the Colchester area?

Well after reading the instruction manual and this site again I came to the conclusion it had to be a fuse issue (hoped more than anything as a new pcb board is about £100). Got to the flat at 7:30 this morning and the boiler was warm, no flashing led on the PCB and no hot water from the taps. I turned it all off and checked the fuse, this looked ok so I put it back in again and turned everything back on. The fuse sparked a little and the LED flashed briefly but then no more :-(, as it was still early and I wasnt thinking right I tried to push the fuse into the holder.... If you cant work out what happened next I will tell you to never touch the fuse on this unit when it is turned on.... 7:30 in the morning and I give myself a electrical shock.... IDIOT!!!.... So I turned it off again and took the fuse out and pressed the brass holders back together so they held the fuse tighter.. Obviously with all the in and outs of the fuse the holder had changed shape slightly.

Put the fuse back in, and made sure the cover was back on the fuse and turned the unit back on. Immediately there was the LED doing its double flash, never have I been more pleased to see an LED lighting up - it was just like christmas for me. Went to the taps and there is was like a present from god!! Hot water and lots of it!!

I would like to thank Mike for all his posts as they really helped me sort this out, I thought I would post the final info so if anyone else is in the same boat as me they can follow my confused thoughts and ramblings and hopefully save themselves some money and learn how their boiler works. I think I have just saved £265 looking at Gledhills site so I am well chuffed!!