What is a key step in calibrating a FD thermostat?

Calibrating a fuel distribution (FD) thermostat involves ensuring that it accurately reflects the actual operating temperature of the equipment. Checking the equipment operating temperature with a thermometer is crucial because it allows you to compare the reading of the thermostat with the actual temperature being measured. This step is essential in determining whether the thermostat is functioning correctly and whether it needs any adjustments.

By confirming that the thermostat accurately indicates the temperature of the food or environment being controlled, you can ensure optimal cooking results and prevent issues such as undercooking or overheating. If discrepancies are found, adjustments can be made to the thermostat's settings to match the actual temperature readings, thereby calibrating it effectively for accurate operation.

The other options—installing a new bypass flame, replacing the thermostat entirely, or adjusting ignition timing—are not direct steps in the calibration process of the thermostat. While they may be relevant to overall equipment service or performance, they do not address the specific need to verify and adjust the thermostat's temperature reading.