Honeywell 24v zone valve, end switch

Craig_3

I recently had a call where the end switch closed and the relay would just chatter. I thought a switch was either open or closed too. Since the end switch isn't available separately, replacing the head fixed it.

Rich Dickinson The Plumbing Shoppe

Has anyone had problems with Honeywell 24v zone valve end switch not closing tt on boiler? Paddle makes contact & pushing button does not always work either. Zone valves on same relay work fine. Replace zv head with new switch works fine. On test bench old switch shows continuity and when wired to 120 volts, will light a bulb. . It's just a switch, what gives? Rich

Plumdog_2

Sometimes it is linkage

The motor may work fine, the end switch may work fine, but the linkage seems to get slippage preventing the paddle from fully deppressing the little button. It is a PITA.

Big Ed

End Switch

Yes they go . They show up when the others also fail. No one notices the slaving of the bad one.....


The reason a higher voltage flows where a lower does not is because the higher the voltage the lower the resistance..Same reason very High voltage is used to transport electricity...