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- 31 May 2007
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Hi,
I'm hoping someone might be able to shed some light on a problem with an oil heatslave 20/25. The owners have just bought the house after it stood empty for 2 and a half years and we're trying to get it all working again. There are two of the same boilers heating separate sections of the house.
One works ok, the other will heat the pre-tank no problem but won't switch to CH. No room stat present. Initially we suspected the actuator as we could move the diverter manually to fire the heating. With a new motor, same problem, tracked it to no power being sent from the pcb to the motor, but the microswitch is live, hence we can fire manually. Checked spindle moves freely.
Eliminated the programmer by swapping in good one from other boiler.
Changed the pcb, still same problem. Then found the CH stat wasn't operating, took it out, and when it cooled a bit, it worked. Put the probe back in the boiler and it stops working. Now wondering if the main boiler stat is the problem as the boiler does seem overly hot - much more than its twin, but why would that stop it activating the actuator? Hope someone can help before we take a sledgehammer to the whole system - its a right dogs dinner but they won't spend the money on it.....
Cheers!
I'm hoping someone might be able to shed some light on a problem with an oil heatslave 20/25. The owners have just bought the house after it stood empty for 2 and a half years and we're trying to get it all working again. There are two of the same boilers heating separate sections of the house.
One works ok, the other will heat the pre-tank no problem but won't switch to CH. No room stat present. Initially we suspected the actuator as we could move the diverter manually to fire the heating. With a new motor, same problem, tracked it to no power being sent from the pcb to the motor, but the microswitch is live, hence we can fire manually. Checked spindle moves freely.
Eliminated the programmer by swapping in good one from other boiler.
Changed the pcb, still same problem. Then found the CH stat wasn't operating, took it out, and when it cooled a bit, it worked. Put the probe back in the boiler and it stops working. Now wondering if the main boiler stat is the problem as the boiler does seem overly hot - much more than its twin, but why would that stop it activating the actuator? Hope someone can help before we take a sledgehammer to the whole system - its a right dogs dinner but they won't spend the money on it.....
Cheers!
