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✎ GovInfoNow plain-language explainer
Bosch Thermotechnology is recalling Buderus brand GB125-35 oil-condensing boilers because the internal siphon can become blocked. This blockage may cause delayed ignition, which damages the exhaust system and creates a carbon monoxide hazard. Consumers are advised to contact Bosch immediately for a free repair. Read more at govinfonow.com/recall/3186-buderus-gb125-35-boiler-recall-carbon-monoxide-hazard.
“Buderus GB125-35 Boiler Recall: Carbon Monoxide Hazard.” GovInfoNow, updated October 11, 2026. https://govinfonow.com/recall/3186-buderus-gb125-35-boiler-recall-carbon-monoxide-hazard. Based on CPSC recall #8721 (https://www.cpsc.gov/Recalls/2020/Bosch-Thermotechnology-Recalls-Buderus-Boilers-Due-to-Carbon-Monoxide-Poisoning-Hazard).
The Consumer Product Safety Commission announced on Dec. 20, 2019, that Bosch Thermotechnology is recalling Buderus GB125-35 oil condensing boilers due to a carbon monoxide poisoning hazard. Consumers should immediately contact Bosch for a free repair.
How to tell if you have it
Buderus GB125-35 oil-condensing boilers
Blue enclosure with Buderus brand name printed on the outside
GB125-35 model number on data plate near top right hand side
White label on blue enclosure showing Bosch Thermotechnology and model number
Sold nationwide from June 2008 through September 2012
What to do
Consumers should immediately contact Bosch for a free repair. Consumers who continue to use the boilers while awaiting repair should have a working carbon monoxide alarm installed outside of sleeping areas in the home. Contact Bosch Thermotechnology at 800-323-1943 from 8 a.m. to 6 p.m. ET Monday through Thursday and Friday from 8 a.m. to 5 p.m. ET, via email at GB125.35Recall@us.bosch.com; or online at https://www.bosch-thermotechnology.us/us/en/residential/home/ and click on the “Knowledge” tab, then click on “Product Approvals, Certifications & Regulatory Info” for more information.
The hazard
The siphon can become blocked, leading to a delayed ignition that can damage the boiler's exhaust system, creating a carbon monoxide hazard. According to the CPSC, no incidents or injuries have been reported in the U.S.
Context
GovInfoNow's records show other recent recalls of similar products include Generac Electric Start Pressure Washers Recall: Carbon Monoxide Risk in Confined Spaces (2026-05-14) and Hayward Universal Pool Heaters Recall: Carbon Monoxide Poisoning Risk (2026-09-17). Dupray Neat Steam Cleaners Recall: Burn or Serious Injury Risk was issued on 2026-02-26.
How to tell if you have this one
Look for a blue enclosure with the Buderus brand name printed on the outside. Check the data plate near the top right-hand side of the boiler for the model number GB125-35 and a white label showing Bosch Thermotechnology.
Brand
Buderus
Product
Buderus GB125-35 oil-condensing boilers
Category
Consumer product
Based on the official CPSC remedy
What to do — step by step
Stop using the boiler
Cease operation immediately to avoid potential carbon monoxide exposure while awaiting repair.
Install a carbon monoxide alarm
If you must remain in the home, ensure a working carbon monoxide alarm is installed outside of sleeping areas.
Contact Bosch for repair
Call 800-323-1943 or email GB125.35Recall@us.bosch.com to schedule a free repair.
Official remedy
What CPSC says to do
Consumers should immediately contact Bosch for a free repair. Consumers who continue to use the boilers while awaiting repair should have a working carbon monoxide alarm installed outside of sleeping areas in the home.
Where it went
Where it was sold
Sold nationwide.
Nationwide
Not listed
CPSC “Sold at”: “Wholesale distributors and installed by independent contractors nationwide from June 2008 through September 2012 for about $6,000.”
Sold nationwide.
Take action
Contact Buderus
We’ve drafted a message you can send Buderus to request your refund or repair — edit it as you like.
Subject: Recall 8721 — Buderus GB125-35 Boiler Recall: Carbon Monoxide Hazard
Hello,
I own a Buderus GB125-35 Boiler Recall: Carbon Monoxide Hazard that is covered by recall 8721 from Buderus.
The official recall notice states: Consumers should immediately contact Bosch for a free repair. Consumers who continue to use the boilers while awaiting repair should have a working carbon monoxide alarm installed outside of sleeping areas in the home.
I’m writing to arrange the remedy described in the recall (a refund, repair, or replacement as applicable). Could you please tell me the next steps to resolve this?
Thank you.
The facts (hazard, remedy, dates, manufacturer) are pulled from the official CPSC recall record. The plain-language summary and step-by-step checklist are written by GovInfoNow to make the official notice easier to act on — they don’t replace it.
Plain-language summary written by qwen3.6:35b-a3b on October 11, 2026, from the official record above. Not reviewed by a person — if it conflicts with the CPSC notice, the notice is correct. Report an error on this page.
GovInfoNow is an independent service and is not a government agency. We republish official CPSC recall data; we don’t issue, amend or administer recalls.