Boiler operates but energy bills are unusually high compared to previous seasons

Safety first: Adjust only user-level settings unless trained.

• Check reset operation: Verify outdoor temperature is displayed correctly. If not, see outdoor sensor fault steps.
• Lower CH setpoint moderately: Reduce central heating setpoint to encourage condensing operation while maintaining comfort.
• Schedule maintenance: Have the heat exchanger cleaned and combustion tuned per Lochinvar's annual maintenance recommendations.

Professional help: Efficiency issues are best addressed during a full service visit with combustion analysis.