Work Performed: Responded to no heat and no domestic hot water complaint on a Navien combination boiler. Upon arrival, boiler displayed error code 733, which according to Navien technical support typically indicates low gas pressure causing short cycling. Results: Called Navien tech support immediately as per error code instructions. Verified inlet gas pressure at the gas valve using a manometer: Static pressure: 8.5" WC Pressure during high fire: dropped to 6.45" WC Both readings fall within Navien’s acceptable range (3.5"–10.5" WC). Observed system operation for 20 minutes; boiler operated normally during both home heating and DHW demand. Heating pressures stable at 24 psi and temperature readings were within normal limits. Cleared error code and boiler resumed normal function. Recommendations: While gas pressure appears normal, the meter is old and rusted—possible cause of intermittent pressure drops. Advised customer to contact Enbridge for evaluation or potential meter replacem