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Beckett Pump losing prime
Good morning all, I'm hoping to get a little holiday help here as this one's got me stumped. My Weil McLain has been running like a champ since September and all of a sudden I started having issues yesterday.
A quick synopsis: thermostat calls for heat, boiler kicks on, lock out button pops (as some point over night during the set back), I open the bleed valve for a few seconds, close it and she fires right up. After this process she will fire back up a as needed as the vaporstat takes control until the thermostat is satisfied. The priming issue only appears to occur during long periods of the boiler being shut off.
Any thoughts on why I'm losing prime?? I checked for leaks around the connections and valves but can't find any.
Luckily I've trained my wife how to prime the beast, might need to extend that training to my teenage girls lol. Thanks in advance! And Happy Thanksgiving to everyone.