Safety first: Turn off power and gas before modifying vent terminations. Use a ladder safely if accessing roof or high sidewall vents.

Step 1 – Inspect terminations: Check for snow, ice, or frost buildup around intake and exhaust. Clear carefully without damaging the vent.
Step 2 – Look for wind effects: If the vent is on a windward wall or near corners, strong winds can cause pressure fluctuations. Temporary shielding may help, but permanent solutions should follow manufacturer guidelines.
Step 3 – Check for condensate in vent: Listen for sloshing or gurgling in the vent. Frozen condensate can block flow. Thaw and correct slope or insulation as needed.
Step 4 – Verify vent length and fittings (pro): Have a technician confirm that the vent system complies with Bradford White’s maximum length and configuration tables.
Step 5 – Consider vent kit or relocation (pro): In severe cases, a different termination kit or vent relocation may be required.

Note: Weather-related issues often manifest as pressure switch or flame loss faults.

Boiler locks out during very cold or very windy weather only.

Possible Causes