The other night while trimming hedges I chopped through the cable and tripped the house electrics. It was approx 48hrs before I realised that the boiler wasn't working. I can get the pilot light on but it won't fire up for either the heating or the hot water. Anything I can do to try and force it back into operation or do I have to call someone out?
Myson Apollo30S
- Thread starter perplexed
- Start date
The obvious thing is to check if you have a live electricity supply to the boiler (if you don't know how to do this safely, get someone in). I don't know this boiler, but it is just possible that the sudden stopping of the pump resulted in the boiler overheating and tripping an overheat stat. There may be a manual reset button. Beyond that you need to look at the instructions and follow the fault finding section. I doubt if we can help unless to can supply more detailed information.
Chris....There is a live supply to the boiler. No reset button as far as I can see and no instructions for boiler. As I said pilot light is on but boiler is not responding to external programmer calling for heat or hot water. Just a thought. The pump is in the cupboard upstairs next to the cylinder. If this wasn't running would that stop the fan coming on or would the fan run anyway?
There are instructions for boiler - it's just that you haven't got them 
. It sounds like you may have a set up with a motorised valve diverting boiler flow to CH or DHW. Such systems switch the boiler and pump on via the motorised valve, which is activated via programmer, room stat and cylinder stat. Does this sound like your system?
. It sounds like you may have a set up with a motorised valve diverting boiler flow to CH or DHW. Such systems switch the boiler and pump on via the motorised valve, which is activated via programmer, room stat and cylinder stat. Does this sound like your system?Yes Chris That is the type of system I have. As I have said it all seemed to work fine until the incident with the tripped electrics. Coincidence or what. I don't know. Could an electrical trip cause a problem with this type of boiler?
In general cutting off the supply will not affect the boiler when the power is resumed.
On an old boiler like this if it overheats it trips off the pilot light.
Is there power to the boiler AND to the controls?
Is the pump spinning?
Tony Glazier
On an old boiler like this if it overheats it trips off the pilot light.
Is there power to the boiler AND to the controls?
Is the pump spinning?
Tony Glazier
You need to check the electrical control circuits, working back from boiler. the boiler may have a permanent live as well as the switched live from the motorised valve. In which case are you sure the boiler is getting a switched live and not just the permanent live? Is the pump working? Is the gas valve on the boiler live? (this might be low voltage via a transformer.)
Boiler sorted now. Man came, got fan running but still no burner. Changed fan pressure switch and all working now. Related to my tripping out electrics he couldn't say but i'll be using a circuit breaker type plug from now on. Just thought I'd let you know.
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
