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Mend Drayton Switchmaster 500 Heating Replacement Timer

Can I replace my Switchmaster 500 timer with a newer model?

The clock on my ageing Drayton Switchmaster 500 heating and water timer has died. Can I directly replace it with a 400 or 600 or 805 model without a major rewring job?

Peter Webb
February 2009
DraytonDrayton Switchmaster 500Heating, Home Heating SystemsHeating Replacement Timer

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Drayton Switchmaster 500 Replacement - Guide