Independent reference · Facts sourced from CPSC, ENERGY STAR and DOE Record verified Aug 18, 2026
Active recall — stop using this product now.
Remedy: free repair · About 170 units
Smoke & CO alarms Recall No. 20-046 Published December 20, 2019

Buderus GB125-35 oil-condensing boilers

The siphon can become blocked, leading to a delayed ignition that can damage the boiler's exhaust system, creating a carbon monoxide hazard. Manufactured by Bosch Thermotechnik GmbH and sold at Wholesale distributors and installed by independent contractors nationwide from June 2008 – September 2012 for about $6,000.

Recalled Buderus GB125-35 oil condensing boiler
What you are looking at

Recalled Buderus GB125-35 oil condensing boiler

Image: CPSC recall notice Two more views

Check the label first

Compare every letter, number, space and suffix. A similar-looking product with a different suffix may not be part of this recall.

Affected model numbers

Why it was recalled

The siphon can become blocked, leading to a delayed ignition that can damage the boiler's exhaust system, creating a carbon monoxide hazard.

0
Incident reports to the firm
0
Injuries reported
0
SaferProducts.gov reports

None reported in the U.S.

The official remedy

Remedy type: repair
01
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.

Product and sales details

ManufacturerBosch Thermotechnik GmbH, of Germany
UnitsAbout 170
Made inGermany
Sold atWholesale distributors and installed by independent contractors nationwide
Sales periodJune 2008 – September 2012
PriceAbout $6,000

How to reach the firm

Phone
800-323-1943
8 a.m. to 6 p.m. ET Monday through Thursday and Friday from 8 a
Email

Verify phone numbers, hours and web addresses on the current CPSC notice before contacting the firm.

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