I have recently moved into a property that has the above type of boiler. It occasionally goes into lockout and displays A02. The boiler resets OK. It is worse it the CH is set to ON instead of timed. Could it be air in rads?
Potterton Powermax HE Boiler Lockout with A02 in display.
- Thread starter willdo
- Start date
I have signed a contract with BG and awaiting the initial visit so there is a service contract in place so yes I do consider the importance!
If the cause of the A02 is something simple like bleeding the radiators then I am capable of doing that.
There is no number after the HE it literally says 'Potterton Powermax HE. I am aware of three different models but they are different capacity boilers so the functions will be the same.
If the cause of the A02 is something simple like bleeding the radiators then I am capable of doing that.
There is no number after the HE it literally says 'Potterton Powermax HE. I am aware of three different models but they are different capacity boilers so the functions will be the same.
A02 is a flame failure lockout condition. There is nothing you can do about this yourself. Not uncommon on these units and your repairman will be able to repair this fault.
Be aware that BG will not start a boiler cover when its not working except at extra cost.
Assuming you have a gas supply, cooker working etc. then you would need a gas reg engineer.
It might be cheaper getting an independent in first as it might be something simple but that depends on the ratio of his costs to the BG extra costs.
Of course as its intermittent BG may not notice on their initial visit.
Tony
Assuming you have a gas supply, cooker working etc. then you would need a gas reg engineer.
It might be cheaper getting an independent in first as it might be something simple but that depends on the ratio of his costs to the BG extra costs.
Of course as its intermittent BG may not notice on their initial visit.
Tony
Neither would most independants, as most of them are unfamiliar with these boilers.
I have been given an explanation from an engineer with a web site. It would appear that it is a problem caused by all the TRVs shutting down together on Powermax HE with an older V1 control board.
Explanation here - http://www.powermax-repairs.co.uk/Powermaxhe.html
Regards
Willdo
Explanation here - http://www.powermax-repairs.co.uk/Powermaxhe.html
Regards
Willdo
You are being very selective with what you are quoting!
It actually says thats WHEN there is no bypass fitted and all the rads have TRVs.
The solution might be to add an auto bypass if yours has none!
But I am always wary of an undocumented fault code which is not listed by a manufacturer. The implication is that its activated by overheating.
Tony
It actually says thats WHEN there is no bypass fitted and all the rads have TRVs.
The solution might be to add an auto bypass if yours has none!
But I am always wary of an undocumented fault code which is not listed by a manufacturer. The implication is that its activated by overheating.
Tony
Have you read the link? Why do you want to add doubt to the explanation? I only quoted a minimum and pointed to the link for full explanation The guy has actually spoken with Potterton Technical I do not see any reason to doubt what he has stated. Yes a by-pass may be a good idea but if keeping a couple of TRV's fully open resolves the issue, especially as I know I have adjusted TRV's since moving in, problem solved.
If that is correct, and there is a lot of misinformation on the internet, then leaving some TRVs fully open would stop it happening again.
However, that is not the professional solution and negates the benefit of those TRVs left open.
I always prefer the proper solution.
Tony
However, that is not the professional solution and negates the benefit of those TRVs left open.
I always prefer the proper solution.
Tony
M
mysteryman
Tell us, Tony, how do you leave a TRV fully open on a rising room temperature?
One radiator in the room with the room thermostat should be fitted with lockshield valves if overheating is the problem.
One radiator in the room with the room thermostat should be fitted with lockshield valves if overheating is the problem.
DIYnot Local
Staff member
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local
