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Mend 309S375 PCB Burnt Heating

pls the value of r6 on the pcb?

my pcb is 309s375 after trying those new parts i find r6 on the pcb is burnt out.. can not find circuit diag.

louis
November 2011
309S375Heating, Home Heating SystemsPCB Burnt Heating

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309S375 PCB: R6 Resistor Value & Repair