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Question:

Issue with Weil McLain water heater - Zone Valve?

I have three zone valves, two out of the three don't ignite the gas. Once I turn up the thermostat I see the lever on the zone valves move but no gas ignition. Only one of three works fine. Any leads? Thanks!

Answer:

HI! IS THERE A CONTROL BOARD TO WHICH THE ZONE VALVES ARE WIRED? IF SO, DO YOU SEE A PRIORITY SWITCH ON THE BOARD - MAKE SURE IT'S SET TO OFF. GOOD LUCK AND HAVE A GREAT DAY!
you are able to drain this water heater, I try this for a residing, and it fairly is what i might do in case you employed me to come returned restoration your concern. i might siphon off extremely some the water via a hose. turn off the water grant, enable it to relax, undo the feed lines on the suitable, do away with the electrical powered feed line, after shutting it off, or the gas line after shutting it down. locate a sufficiently small hose or plastic tubing to in positive condition into the suitable installation on the tank, start up a siphon and have some buckets waiting to seize the water. shop music of the type of buckets you siphon off and once you have bumped off as much as you are able to, tip the water heater over on that is facet and you are able to then have finished get right of entry to to the previous drain valve to place despite equipment you ought to on it to do away with it. maximum possibly you will in simple terms want to do away with the finished element. In that is place, i might propose a 4 x 3/4 galv. nipple with an entire circulate ball valve for a drain. The ball valve ought to have 3/4 lady threads on the two ends and you will get an adapter installation to pass from the pipe thread to a hose thread. you will not have confidence how common it fairly is going to be to empty your heater then. as quickly as you have each thing put in, set if back up and reattach on the suitable, hook up gas source and verify to thoroughly fill the tank, bleeding all the air out of it earlier turning on the electrical powered, despite if it fairly is electrical powered.
the zone valve will turn on the pump. if the water temp is high enough, the gas wont turn on. check the aqua stat to see the temp setting
Generally, there are those who swear by and those who swear at Weil-Mclain. I am amongst the former - if installed properly and with the correct peripheral equipment. Otherwise, they can be quite touchy and very fussy. The simplest solution I can suggest is that you purchase a WM Zone Valve Control - linked below. It will be fully compatible with the rest of your system. Not so expensive and very effective.
Located in most zone valves is a end switch. The end switch closes when the zone valve opens. It sends a signal to the AquaStat to bring on the boiler. The pump runs as soon as there is a call for heat on any zone. Now if the water temp in the boiler has reached its high limit than the boiler will not come on. It will wait until the temp drops in the boiler and then it will ignite. So watch it for a few minutes. The end switch or connections may be to blame if the boiler does not come on at all after a reasonable amount of time. The end switch does fail on occasion. Best bet is to call a professional if you continue to have problems

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