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- 11 Mar 2006
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Hi all long time no speak 
Worcester 350 Combi with "built in" digital timeclock.
Extremely loud buzzing/vibrating from Relay RL1 on right hand side pcb (the one with two boards linked with ribbon connector).
Overheat Stat has continuity.
Low Water Switch = Live on white, Live on Brown.
Removing plugs one at a time from pcb's does not indicate location of fault (e.g the buzzing continues).
Removing Low Water Switch or Overheat Stat connections from pcb stops relay buzzing, but i assume this is only breaking the power to Relay RL1 and not indicating the actual faulty component.
I suspect the pcb is gubbed, but i wanna be sure as its a bit expensive.
Any ideas ? And if it is the pcb what could have caused the faulty relay.
Mucho thanks.
Worcester 350 Combi with "built in" digital timeclock.
Extremely loud buzzing/vibrating from Relay RL1 on right hand side pcb (the one with two boards linked with ribbon connector).
Overheat Stat has continuity.
Low Water Switch = Live on white, Live on Brown.
Removing plugs one at a time from pcb's does not indicate location of fault (e.g the buzzing continues).
Removing Low Water Switch or Overheat Stat connections from pcb stops relay buzzing, but i assume this is only breaking the power to Relay RL1 and not indicating the actual faulty component.
I suspect the pcb is gubbed, but i wanna be sure as its a bit expensive.
Any ideas ? And if it is the pcb what could have caused the faulty relay.
Mucho thanks.
