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Halstead issues?

Have a Halstead Quattro with domestic water problems. Have fitted new diverter diaphram and heat exchanger, sometimes when taps turned on I get cold water and sometimes hot. When tap is on the boiler is working, could it be an air lock in system
Roger, August 2012
No.

More likely, the HW request sensor, Could be microswitch or other, But as you have been at the divertor, you should know.

SD, August 2012
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