Uploaded March 2020 | Updated September 2026, 2 days ago

---

Knipex Pliers Wrenches: amzn.to/2QG2epi
Grundfos UPS15 Boiler Circulator Pump: amzn.to/2UhifEk
Pump Isolation Flanges: amzn.to/2QIRIxJ
Flange Gaskets: amzn.to/2wpJAvh
Other Boiler Pump Options: amzn.to/33GFpqW

Here I go through the diagnosis process for a stuck boiler circulator pump and then the step by step instruction for how to replace the failed pump while draining as little water as possible from the system.

If your boiler / water furnace is not working this is a very common issue as hydronic circulator pumps are a wear part that will fail after 10 or 20 years of use.

You can support the channel at NO cost to you by using one of the above affiliate links (even if you don't buy the exact item you will still be helping with any purchase you make).

Blessings from MN,

Ben