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Heating, Home Heating Systems (31117 other questions)
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Worcester Bosch 240 combi?

My central heating temp is fine but the hot water supply is hardly luke warm after an initial couple of minutes of very hot water.

Do I need a new secondary heat exchanger ?



Michael Gill
December 2019


There is more help available. Mend - worcester, bosch, 240, combi
Need to mend your Bosch 240 home heating system?

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First thing to try would be to let the entire central heating system cool down, then set central heating to off, (or choose a time when central heating is not programmed to come on), then turn on a hot tap to fire up boiler. Leave tap running for a few minutes, then feel the central heating output (CH Flow) pipe coming out of boiler. If this pipe is heating up, your problem will be a faultly diverter valve within the boiler. Try this and let us know if CH flow pipe reamians cool and we will need to look at other possible causes. I suspect that your boiler could be 20 years old and parts may be difficult to obtain.

Rupert
December 2019

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Other questions in this category - Heating, Home Heating Systems
worcester bosch 240?

my boiler was drained from the small tap underneath the boiler while we had a new radiator and pipe work fitted . when the boiler was refilled it wont kick in for hot water or heating. i think it could be airlocked. please could anybody help ? pauline...

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noisy fan on worcester bosch 240?

Each time the boiler fires up the fan has become quite noisy. In my limited knowledge sounds like could be bearings. Is this a common fan problem ? Boiler must be about 10 year s old...

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replacing the diverter valve diaphram?

i think i need to replace my worcester bosch 240 diverter valve diaphram as im only getting hot water and no heating,does this sound right ?if so do i need to drain the system first? ive read its a 15 minute job,its at the front of the boiler...

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What part do i need?

My boiler is a Worcester bosch 240 Combi. The CH, when switched on works fine. When i turn on the hot water taps they get hot-ish eventually, but the CH also comes on. What i do know is, that the diverter valve still activates the two micro switches, and fires up the boiler when the hot tap is turne...

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Overheat Thermostat Tripping on Bosch 240 Combi RSF?

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worcester bosch 240 combi RSF?

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Pilot light Worcester bosch 240?

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