myson apollo overheating

[bigandy658]

i have a myson apollo boiler and it does not switch the heat off it just keeps the gas on till it boils. Can anyone please tell me whats wrong.

Regards Andy

 

[gas_man_gaz]

could be ya thermister, hav ya got it on the high or low setting? which ever ya got it on flick it to the other settin and see if it cuts off wen up2 temp

 

[bigandy658]

its on high

 

[bigandy658]

on low it clicks off yes

 

[gas_man_gaz]

sounds like ya high thermister has had it, does it get hot enuff wen ya run it on low?

 

[bigandy658]

no its trying to run 16 rads. is this an easy job to change

 

[gas_man_gaz]

yea quite easy.. all the thermister does is control how hot the system gets so it dosnt matter how many rads its tryin to heat up. do they all get hot or start to warm up wen its on low?

 

[bigandy658]

yes just all luke warm.

where can i locate this on the boiler please.

 

[gas_man_gaz]

id recomend ya get a pro in as ya have to remove the combustion case and isolate the electics to the boiler.. but its at the top right of the boiler under a small metal cover, they should be two stats i think its the one to the front that controls ya high setting but ud hav to check that

 

[bigandy658]

thank you. its people like you who help this life to be great.

THANK-YOU

 

[gas_man_gaz]

cheers pal

 

[ChrisR]

This is potentially a killer boiler. Don't take the case off.
See FAQ number 43.

 

[kojakxx]

From the Manufacturers Instructions: "Three thermostats are mounted on the right hand (flow) pipe from the heat exchanger. The 'Hi' thermostat is marked with brown paint and the 'Lo' thermostat is marked with white paint"..."Ensure that a brown and yellow wire goes to the 'Hi' thermostat and a white and yellow wire goes to the 'Lo' thermostat.

 

[gas_man_gaz]

well where's the 3rd then? theres only 2, hi or low

 

[nickso]

well where's the 3rd then? theres only 2, hi or low

third one is the overheat