Invoice Summary – 2005 Ruud Single-Stage Furnace (Mid-Efficiency) Call type: No heat / flame signal issue Brand: Ruud Work Performed: - Diagnosed poor flame signal; flame rod required cleaning. - Advised client to proceed with a cleaning and furnace service; client agreed. - Cleaned the flame rod and retested; flame signal is now in the normal range. - Performed furnace service including inspection of electrical components and all safety circuits. - Completed combustion test; readings are normal. Results: - Furnace is operating smoothly. - No concerns or safety issues noted. Recommendation: - If the issue returns, replacement of the flame rod is recommended.