Water Heater / Boiler Error Codes: All Brands

ENERGY STAR certified models

Source: ENERGY STAR open data (data.energystar.gov) – number of certified models currently listed.

Official safety recalls (US CPSC)

• Recall Program to Replace Vent Pipes on Home Heating Systems · Carbon Monoxide (CO)
• Bosch Thermotechnology Recalls Buderus Boilers Due to Carbon Monoxide Poisoning Hazard · The siphon can become blocked, leading to a delayed ignition that can damage the boiler's exhaust system, creating a carbon monoxide hazard.
• Viessmann Recalls Boilers Due to Carbon Monoxide Hazard · The boiler heat exchanger back plate can corrode and leak flue gases, allowing the boiler to emit excessive amounts of carbon monoxide, posing a CO poisoning hazard to consumers.
• Viessmann Recalls Gas Boilers Due to Fire and Carbon Monoxide Hazard (Recall Alert) · The boiler can overheat and emit flue gases into the venting system and carbon monoxide can leak throughout the residence, posing a fire and carbon monoxide hazard to consumers.
• Bosch Thermotechnology Recalls Boiler Survey Kits Due to Fire Hazard · The use of a silver-colored gas pipe adapter included in the service kit can lead to gas leakage, posing a fire or explosion hazard to consumers.
• Gas Boilers Recalled by Bosch Thermotechnology Corp. Due to Carbon Monoxide Poisoning Hazard · A problem with the boiler's ignition due to insufficient output voltage from the boiler's transformer can damage the boiler's venting. This can result in leaking flue gases, posing a risk of carbon mo
• Bosch Thermotechnology Recalls Boilers Due to Fire Hazard · An electrical connector can overheat, posing a fire hazard to consumers.
• Viessmann U.S. Recalls Boilers Due to Fire Hazard · The boiler can leak gas, posing a fire hazard to consumers.

Source: US Consumer Product Safety Commission recalls API. Check your model and serial number on the linked recall notice.