Why oh why did you poke the appliance gremlin? Yesterday I get a yell from the laundry room ... "THE DRYER IS BROKEN!"
damn damn damn grumble grumble - because my email is full of "the database is broken" from work (in the middle of migrating hundreds of databases to Cloud and have been working stupid hours. I'm no longer able or tolerant of the one man band working 3 shifts any more)
turns out it popped the breaker. Anything popping a breaker makes me nervous, since I rewired the house and upgraded to a 200 amp main panel on the last remodel and got rid of the aluminum wiring (except the dryer and a/c ... now realizing serious screwup on my part there - but the dryer was gas at that time, and the a/c I just forgot).
So, I reset the breaker and went back to the databases, and she finished the load. An hour later, another "it's broke again" (the dryer, not the databases).
This time requires investigation before resetting the breaker. Turns out that the dryer just about finished the cycle before popping the breaker, so not an immediate indication of a shorted heating element. Pulled the cord - shiny clean connectors, no indication of hot wires. Pulled the outlet, everything tight and clean (not counting the anti-oxidant coating I put on during the dryer installation when we switched back to electric). I checked the breaker connections and they're the same - clean (with anti-ox), tight, no heat indications.
This Whirlpool dryer has some automation features but is fairly simple compared to today's computerized units. Manual time, auto time, 4 heat settings, Wrinkle guard and end of cycle alerts. She runs it on auto time, and mostly Medium heat. So, troubleshooting has a few permutations but not overwhelming. Starting with manual 60 minutes, medium heat, no wrinkle guard, no end of cycle alert. Started it up and watched the draw at the breakers, showing 24 amps and 85°F on A and 25 amps, 90° on B legs, with draw dropping to 0 amps on A, 4 amps on B as the heating elements cycle. And it ran for 60 minutes to completion and dry clothes.
Second load was Auto time, medium heat, no wrinkle guard, no end of cycle alarm. Same results and a flashback to Navy VIDSMAF signoff A-799 "Unable to duplicate" came to mind.
So, out of clothes to dry and out of time to continue to troubleshoot. Cover is off the service panel, tools scattered all over, and here I am fixing databases at 5 am on a Saturday. Stay tuned for round 2 and hoping I find the Wrinkle guard or end of cycle has some bad component causing a short.