This advisory is to alert you to a potential safety issue with the product listed below. 
In extreme situations, this issue could lead to property loss or serious personal injury.

The Siemens Quality Program requires continuous monitoring of product performance.  This process includes third party certifications, as well as tests and procedures specific to Siemens. We have identified a potential safety issue with Q-Series Temperature / Room Relative Humidity / Relative Humidity & Temperature Sensors


The products at issue are Siemens Building Technologies Q-Series Temperature / Room Relative Humidity / Relative Humidity & Temperature Sensors. The Siemens sensor, when used under certain high-power input conditions, can have a capacitor on the printed circuit board degrade over time and then fail which can overheat and in some cases could result in the possibility of fire, property damage, or personal injury.

This only involves the above sensors manufactured after August 2007

Immediate Safety Actions Required:

In order to ensure that all potentially non-conforming product is captured, all of the affected catalog numbers with affected date codes listed below will need to be quarantined and returned. Please contact Siemens Building Technologies Customer Support team at 1-800-516-9964 in the US, as explained further down in this safety notice.

Customer contact information for Canada:

Phone number: 1-855-899-9937
Fax number: 1-855-870-7305

Follow-up Actions:


If you believe that you may have a suspect room sensor please call 1-800-516-9964, Siemens Building Technologies Customer Support team. The customer will be asked to purchase a new sensor(s) and immediately be issued a Return Material Authorization (RMA) Number and sent a return product form. Once the product(s) under recall is returned, Siemens will refund the purchase price of the new sensor, as well as compensate for labor as detailed on the return product form.

Siemens apologizes for the inconvenience this recall may cause.  The company is taking all necessary steps to remedy the situation and ensure the safety and effectiveness of its products.

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Siemens Sensors Recall - Identification Document

Please direct all questions to 1-800-516-9964 in the US.

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