B737 Probe Heat Panel

B737 Probe Heat Panel
P5 FWD OVERHEAD

Probe Heat Lights

  • Illuminated (amber): Related probe not heated.
  • Note: Probe heat lights do not indicate system status if operating on standby power.

PROBE HEAT Switches

  • ON: Power is supplied to heat the related system.
  • AUTO: Power is automatically supplied to both A and B probe heat systems when either engine is running.

TAT TEST Switch

  • Push: Electrical power is applied to TEMP PROBE on the ground.