Trane
Pressure band
LockoutInducer / vent at that rate
Modulating prove failed at the requested capacity. Not a single discrete PS swap.
Walk Pressure band in Diagnose
Sign in for the next measurement
First check
1 Watch one full try — do not reset
Write the Trane XC95m code. Watch inducer, HSI glow, valve click, flame, µA. The step that dies is the repair. Resetting only burns another try into a harder lockout. Vent, trap, collector, inducer. 96% water still kills draft at every rate.
Expect: Call → Prove → Ignition → Outdoor
The rest of the walkthrough is Diagnose.
On the plates
- Vent, trap, collector, inducer. 96% water still kills draft at every rate.
- Pressure transducer / hose on modulating IFCs — there may not be two click-style switches like S9X2.
- Do not pull the S9V2 E3.1/E3.3 unplug playbook unless THIS IFC actually has those discrete switches.