Dishwasher displays F7E1; water does not heat properly, and dishes are not drying.

Safety: Turn off power at the breaker before testing heater circuits.

• Run hot water first: Before starting a cycle, run hot water at the sink until hot. This reduces heating load and can help confirm if the heater is the issue.
• Inspect heater: Look under the tub for the exposed heating element. Check for breaks, burns, or corrosion at the terminals.
• Continuity test: With power off and wires removed, test the heater and high-limit thermostat for continuity. Replace any open components.
• Check wiring: Tighten any loose heater terminal screws and inspect wires for heat damage.
• Control board: If all heater components test good but the heater never energizes, replace the main control board.

Warning: Do not bypass thermostats or operate with a known heater fault; risk of overheating.