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Andrew Smith
Andrew Smith, Plumber
Category: Plumbing
Satisfied Customers: 3756
Experience:  City and Guilds qualified plumber
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I have just removed the heat exchanger to clean it out yesterday,

Customer Question

I have just removed the heat exchanger to clean it out yesterday, its been reinstalled and after filling up the system adding fernox and system has been good for a day, but this morning I have turned on the hot water tap but theres no ignition on dhw but the it ignite when ch is switched on, having to turn the heating on to get the ignition, turn the dhw on then heating off, the ignition then stays on throughout the dhw demand, ie running a bath. Have i done something whilst removing the heatexchanger?
Submitted: 3 years ago.
Category: Plumbing
Expert:  Andrew Smith replied 3 years ago.

Andrew Smith : It sounds like the domestic hot water flow switch is at fault
Andrew Smith : Do you have the make and model to see which type it has?