Hydronic Radiant Floor Heating Not Working - Bad Thermostatic Mixing Valve Replaced & Valves Added

On this service call we repaired 3 bathroom in-floor radiant heat that wasn't working. We found a defective thermostatic mixing valve on the boiler and the original installers got real lucky when they didn't install isolation valves - which we added. Quickly confirmed the floor is not heating with the Flir i7 thermal camera.

Things I used:
Flir i7 Thermal Camera https://amzn.to/3DlCeXg
Taco Mixing Valve https://amzn.to/3zbqoMF
Ball Valves https://amzn.to/386RdG3

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Видео Hydronic Radiant Floor Heating Not Working - Bad Thermostatic Mixing Valve Replaced & Valves Added канала Mikey Pipes - Pipe Doctor Plumbing & Heating & Air