• Bosch Pro Tankless 425HN Ignition Unit - LOC 8100 - 8707207272 - Non-returnable

    - MAY NOT WORK FOR ALL 425HN MODELS -- CALL BOSCH FOR CONFIRMATION - Also known as Part Number 87072072720

    Product ID • 870720727200

  • $95.75


Bosch Pro Tankless 425HN Ignition Unit - LOC 8100 - 8707207272 - Non-Returnable.

Warning!  This Ignition unit may not work for all 425HN Models.  Some older 425HN Models require part number 8707207142 instead.  Please call Bosch to verify the correct part number needed for your unit.

Warning!  All parts are non-returnable.



Bosch Aquastar Water Heater repair parts ship via Fedex or USPS. Most small, light weight parts on this page ship via Post Office.

Please be sure to provide us with a valid postal address if it's different than the UPS address. You should receive most shipments within 2 to 10 business days.

If you have searched for a part and can not find it - make sure you have contacted Bosch Water Heating directly to obtain an exact part number.

If you still can not find the part - we can special order most parts that Bosch Water Heating provides. These parts are special order and will take longer to process than normal repair part orders. So expect these special order parts to take an extra 2 or 3 days. Before you call us, make sure you have done the following: Make sure you have obtained the exact part number from Bosch Water Heating If you do not have an exact part number - we will not be able to help you!

Bosch Water Heating strongly recommends the use of a qualified service technician for installation or repair of any gas or electric water heater.

When directly purchasing a service part, the buyer is responsible for its safe installation and repair, and cannot hold Bosch Water Heating or liable for any improper use or installation of that service part.

The Bosch phone number is as follows: 1-866-642-3198


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