Capture an intermittent fault
Make the conditions reproducible before replacing a part that currently passes.
Build a timeline
Record elapsed time, temperature state, load, selected program, and the stage at failure. Separate what the customer saw from what you personally observed. Preserve existing fault information before a permitted reset.
Change one condition
Use a safe comparison that varies one relevant factor. Do not provoke faults by moving exposed live wiring, defeating protection, or repeatedly operating a unit with an unresolved hazard.
Respect the test window
A cold component test only describes the cold test. An intermittent condition may require the manufacturer’s specific method or a longer observation period. “Not reproduced today” is a valid finding.
Define the follow-up
Specify what the customer can safely record during normal use, what requires stopping use, and what you will inspect next. Keep the recommendation proportional to the evidence.
Make the next decision.
A fictional dryer heats for the first cycle but later loses heat. Its cold component readings pass. Does that eliminate a temperature-dependent fault?
Compare your reasoning
No. The initial test and the failure occurred in different conditions. Record the sequence and use the relevant model procedure for the warm-state complaint.
Continue in the course
AR-101: Gas heat fails after the first cycle ↗Original educational synthesis based on the supplied AR-101 material. First edition, October 24, 2026.
Record what supports your conclusion.
Use the evidence worksheet to separate facts and assumptions.