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Mend Bosch Boiler Central Heating Heat Exchanger

Too much preassure in Bosch boiler?

I have the problem with my central heating displaying 3 bar preasure, when I turn a tap on in the house (hot or cold) the preasure drops, the filling loop is disconnected. Also when I turn the stop cock off the preasure drops to zero if I turn a tap on. I'm guessing theres a leak between the radiators and the hot water system. Could this be the heat exchanger?

M
October 2009
BoschHeating, Home Heating SystemsBoiler Central Heating Heat Exchanger
How much does a new heat exchanger cost?

M
October 2009
Yes, unfortunately. Well diagnosed!

John
October 2009

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Bosch Boiler Pressure Drop - Help & Advice