potterton house warmer 45 lock out

[chuckstre77]

Hi guys, i have had a problem with my backboiler for a while now and its really getting me down. The back boiler keeps locking out. I have had the PCB changed, a new programmer, and a gas engineer look at the system. He says it must be the wiring that is wrong due to a previous mishap. I have had the wiring checked twice by an electrician, he is sure its a problem with the boiler.
The boiler ignites to keep the water warm, however, it never used to do this. When the water gets to temp, it locks out.
What i need to get to the bottom of, is why does the boiler keep igniting when it didnt previously, and why is it locking out.

 

[gas4you]

From your post this seems a strange problem

Has anyone checked the boiler stat is working correctly? Could be locking out due to overheat

Has the pump been checked that it is working?

 

[namsag]

YOU mean it keeps igniting when it shouldn`t ie clock is off

 

[Gas2Air]

Quite strange what your saying. These boilers have had a problem with flame lift/pilot ignition due to air intake and no pilot shield that could cause the ignition problem you say? Further info required, ie is it gravity a hot water system?

 

[chuckstre77]

sorry, forgot to mention, also had pump changed. It keeos igniting when clock is off, then locking out ( i presume when it gets to temperature)

 

[namsag]

Microswitch in motorised valve is possibly stuck giving power to boiler when it should not

 

[chuckstre77]

so, im guessing that i should get gasman to change motorised valve then? i know i shouldnt ask prices but what range should i be looking at?

 

[Gas2Air]

Probably best to post whne yuo aer claear what you are saynig? Do a search on S plan valves and faults, if you can se

e.

BTW who did you get in to change and replace all them components?

 

[chuckstre77]

I got a corgi registered gas engineer in to change all components, and an electrician to check wiring. I have the installation booklet and it doesnt say anything about a motorised valve on the back boiler.

 

[Gas2Air]

Stop Stop. Let's make it simple FFS. You have a clock/timer for ch/hw yes, good?

Can you have ch on without hw via the clock/timer?

 

[namsag]

Good luck to ya G2A it could be a long night

 

[chuckstre77]

No, c/h can only be on with h/w, but hot water can be alone, its a gravity system.

 

[namsag]

You need a new sparky then as you cant get much more basic than what you have. he is missing the basics

 

[Gas2Air]

Good luck to ya G2A it could be a long night

It's always a long night.

 

[kevplumb]

Good luck to ya G2A it could be a long night

It's always a long night.

lucky sod