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We have 247 questions about mending 'heatslave'

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Mend Heating, Home Heating Systems

Fix my Worcester Heatslave 20/25 oil boiler?

Worcester Heatslave 20/25 boiler 10 years old - over heating the domestic hot water, dangerously hot despite a... [Read more]
Mend Heating, Home Heating Systems

How do I fix my Worcester Heatslave 20/25 combi?

If I run the hot water for a few minutes the temp drops to about 20 degrees, I've turned up the dhw thermostat... [Read more]
Mend Heating, Home Heating Systems

where is it ?

Where is the re set button on my Worcester Greenstar Heatslave boiler??
Mend Heating, Oil Filled Radiators

Worcester Oil heatslave 20/25 rads coming on when selected off position?

I have a Worcester Oil heatslave 20/25. Have selected heating to off position & water to on position as norma... [Read more]
Mend Heating, Home Heating Systems

Heating Problrm?

Hi,I have a heatslave 20/25 Combi boiler,Diverter valve was changed as went faulty. since then have no heatin... [Read more]
Mend Heating, Home Heating Systems

Worcester Heatslave Oil Boiler?

Boiler light is on,water pump runs but boiler will not initiate firing sequence when either hot water or heati... [Read more]
Mend Heating, Home Heating Systems

i have an heatslave 20/25 oil combi?

our heatslave 20/25 oil combi boiler seem to start but we are getting no hot water and no heating. i have pr... [Read more]
Mend Heating, Home Heating Systems

worcester heatslave 9.24?

my boiler will not stay lit .the pilot light willnot stay on. i,ve replaced the thermocouple.
Mend Heating, Home Heating Systems

replace water tank heatslave 20/25 boiler? its leaking?

Is it possible to replace the water tank? I have limited side access' so is it possible to pull out from front... [Read more]
Mend Heating, Home Heating Systems

Worcester heatslave 15/19 Hot water not working?

My raidiators and hot water are not working either. If I turn the hot water on I can hear the flow switch clic... [Read more]

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