Product Information
Control_unit HT3 GZT5-II Bosch USA SP
Please note: Hydrowest Products Ltd. is a wholesale distributor and sells exclusively to licensed contractors and trade professionals.
Fast Shipping
In-stock orders ship within 1 business day to anywhere in Canada.
Code-Compliant
All products meet Canadian HVAC and gas code standards.
Wholesale Pricing
Trade pricing for licensed contractors. 40+ years in the industry.
The Control_unit HT3 GZT5-II (part no. 8737716136) is a Bosch parts-category replacement control unit intended to manage core control and sequencing functions in compatible Bosch heating appliances, simplifying commissioning and field service. Compact for panel-level replacement, it centralizes control and diagnostic signals to support efficient maintenance and reduce system downtime. A search of Bosch North America sites found no model-specific documentation; this description uses the product name and category only.
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