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.
Replacement control module for Bosch HT3-class heating appliances (GZT5‑II variant), intended for professional service and parts inventory; suitable as an OEM Bosch replacement to restore control functionality and maintain system integration when an HT3 control is exchanged. I was unable to locate product-specific technical documentation for part number 8737712407 on Bosch North America sites; Bosch spare-parts catalogs reference control units generally but did not return this exact part. (bosch-homecomfort.com)
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