Recent content by Optimus

Potterton Suprima flow pipe, so max temp should be mid 80s

I need to get some thermal paste suitable for a boiler thermistor (dry fitting). Is the stuff you use on CPU heatsinks suitable for this job? You can get variants with max temp ratings anywhere between 130C and 200C. If it is suitable, what type is best, e.g., silver or silicone? Thanks.

Mixture of paranoia and inexperience methinks :D PCB was definitely stuffed - lost track of the number of reset pushes it needed. Touch wood, none since the PCB was changed. I'm not really sure what 'normal' is for cycling to be honest, as the boiler never worked properly since I...

Thanks. Will try turning the boiler temp down, and also the pump flow rate as I assume that will give the water a longer time flowing round the system and thus longer to cool. BTW, I'd assumed that the temp control on this boiler just set the cut-off temp for the CH water heat, say 60C or...

Ok, thanks for the pointer. Pretty sure it was the PCB as the boiler was behaving erratically before it was changed - it was ok for 2 weeks and then locked up 3 or 4 times a day. Changing the PCB has at least given me a boiler which turns on and off reliably. However, I'll check the pump...

Have been having the lockout fault on a Potterton Suprima 50L, so had PCB replaced with 5111603. Fixed the lockout problem, but rapid cycling has become apparent since. When starting from cold, takes about 10 mins to reach temperature, all radiators getting hot, albeit probably not balanced...