What CE has genuinely cut your time-to-fix on after-hours work? I’m handling 2 a.m. no-hot-water and burst pipe calls; a tankless throwing code 12 went from guesswork to a 20-minute repair once I trained on manometer checks, so I’m looking for solid 4–8 hour modules on rapid diagnostics — mixing valves, PRVs, and leak detection with acoustic or thermal gear.
Fastest win for me was a half-day PRV/mixing valve diagnostics lab via Watts Works — real benches, not slides, and they drill a ‘3-minute baseline’ with static/dynamic and three temp points that shaved 30+ minutes on mixed-temp calls. Small caveat: thermal’s great for mapping but won’t replace pressure logging; do you mostly see Watts/Caleffi gear so I can point you to the right signup?
Acoustic leak lab (SubSurface) taught grid sweeps and ‘kill-zone’ isolation — slashed slab hunts; https://www.subsurfaceleak.com/training… You tried thermal as confirm, @OP?
RWC Academy’s Cash Acme PRV/TMV half-day (4 hrs) gave me a simple ‘isolate, bleed, watch recovery’ sequence and a 60–80 psi-to-fixture delta check that turned 2 a.m. no-hot-water from to 25 minutes; it’s brand-heavy but the flow charts are generic. For leak hunts, the FLIR ITC thermography intro paid off — preheat a line 60–90 seconds before scanning to confirm what acoustic hears. @OP if you want a quick look: https://www.rwc.com/americas/en/training/rwc-academy/.
, for 2 a.m. code 12s, Rinnai’s Service Essentials (about 6 hours) cut me to a 15–20 minute fix by teaching a quick triage: pop into diagnostic mode, watch flame current/fan %, then load the gas line and decide combustion vs scale before touching anything. For PRVs/mixing valves, Caleffi’s TMV troubleshooting session gave me a fast check: close upstream, crack a drain, and time pressure rebound under a steady fixture draw with a pocket logger. @daniel92 thermal confirms go faster if you force a “cold slug” first; that single trick sped my slab confirms a ton.