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The Honeywell 3 port valve on my heating system has part number 40003915-003. I can't find this listed anywhere so I assume it is obsolete. It was installed when I moved in 23 years ago so it's quite old now. It's now stuck with CH and HW both open.
Does anyone know if a direct replacement is available?
I'm guessing that it's not worth replacing the actuator on such an old valve even if one is available.
Does anyone know if a direct replacement is available?
I'm guessing that it's not worth replacing the actuator on such an old valve even if one is available.