Work Performed: Upon arrival, furnace circuit board displayed an error code for the pressure switch. Found that the air fan of the pressure switch was stuck in the closed position. Advised the customer that the furnace needed maintenance. Removed the pressure switch tubing, checked for blockages, and manually activated the pressure switch by blowing through the tubing. Determined that the pressure switch was stuck in the closed position but temporarily freed up. Performed a manometer test on the inducer motor, confirming that it is operating at a higher pressure rating than the pressure switch (which is good). Pressure switch may need replacement in the future if the issue recurs. Maintenance Performed: Conducted a full furnace maintenance, including: ✅ Temperature rise check ✅ Combustion analysis ✅ Full safety check ✅ Electrical component check (voltage verified) ✅ Flame sensor cleaning After maintenance, the furnace is operating normally at this time. Additional Recommendations: Fur