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I've got an immersun board number P1060-12A, it decided to blow itself to bits, I've had the bulk of the problems sorted but I cannot find a value for the diode marked D9, ringed in the photo, can anyone help with the value of this diode?

Littlefuse bidirectional tvs diode 440v nominal breakdown voltage. Part no. TPSMB440CA-A ( i think).



If the varistor, triac and tvs have blown up you may want to check the big black vishay 5uF caps under the display:- it's usually the failure of the cap on the mains side that causes the varistor circuit to self destruct.

Thanks for the information, the parts are on order.