Bosch 7738004926 High Limit Sensor

- Snap-action disc thermostat that guards HVAC equipment against overheating.

- Opens the control circuit when monitored surface temperature exceeds the factory set point.

- Cuts power to the heating operation until conditions return to a safe range.

- Contacts close automatically once temperature falls back within limits.

- Bimetal disc reads temperature through direct surface contact rather than surrounding air.

- Wide metal mounting flange extends from both sides of the phenolic body.

- Elongated mounting slots allow slight positional adjustment during installation.

- Exposed metal sensing cap seats flat against the heat exchanger, plenum, or cabinet wall.

- Upright quick-connect spade terminals for fast wiring.

- Two pan head machine screws included for straightforward replacement

- Alternate part number 7-738-004-926.

The Bosch 7738004926 High Limit Sensor is a snap-action disc thermostat that protects HVAC equipment from overheating by opening the control circuit once the surface temperature it monitors rises past its factory-calibrated set point, cutting power to the heating operation until conditions fall back into a safe range and the contacts close again on their own. Mounting is handled by the wide metal flange that wings out on both sides of the phenolic body, with elongated slots that give a small amount of positional adjustment during installation and pull the exposed metal sensing cap flat against the heat exchanger, plenum, or cabinet wall so the bimetal disc reads temperature through direct contact rather than surrounding air. Two pan head machine screws and upright quick-connect spade terminals are included for a straightforward replacement.