I was woken up early this morning with a "thud" sound. To me, sound like something was hitting the house. Then I almost called 911 because somebody was shooting off rounds at 5 am. I mean, I don't mind people shooting, but when each shot makes my house shudder?
...Anyways. Finally figured out that what I was hearing was one of my zone valves slamming shut with regularity, the noise was being transmitted by my pipes!
Tear the zone valve apart, find the teeth on the gear on the motor have, well, broken off. $0.01 tiny gear breaking renders $40 motor useless on $60 head on $100 zone valve(or so).
I'm currently shopping for a replacement motor, because not having to worry about sweating pipe to replace the complete valve is worth it even if the cost ratios were reversed. Of course, the local supply stores aren't open at the moment, so I have the zone forced open. It'll get heat when anything calls for heat, but then, it's my most frequently used zone anyways.
Any advice on who to buy the replacement motor from? It's a synchron.