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Bosch Aquastar 125FX Water Heater Repair Parts - All Models

Bosch Aquastar 125 FX Gas Tankless Water Heater Repair Parts for heaters produced before January 2003. Please check the chart - click here to be go this Chart. You will need your first 3 digits of the serial number of the Aquastar 125 FX.

Water Heater repair parts ship via Fedex or USPS. Most small, light weight parts on this page ship via USPS. Please be sure to provide us with a valid postal address if it's different than the UPS address.

Most shipments are received within 2 to 10 business days.

Warning! All parts are non-returnable!

Viewing 19 Products

View All Bosch BBT Products

- v7524
- Bosch Aquastar 125FX Temp Adjustment Collar and Knob - 8702000219 - Non-returnable
  
  • Old Part Number 8700403008 and 87020002190 • LOC 3075 • Part Works For
  
  870040300999 • View Detail • Free Shipping Eligible • Available: 3
  
  $25.95
- $25.95
  
  Qty
- v7525
- Bosch Aquastar 125FX Temp Adjustment Knob - 8702000111 - Non-returnable
  
  • Old Part Number 87020001110 • LOC 3205 • Part Works For
  
  870200011999 • View Detail • Free Shipping Eligible • Available: 1
  
  $15.75
- $15.75
  
  Qty
- v7527
- Bosch Aquastar 125FX Pilot Assembly NG or LP - 8708105491 - Non-returnable
  
  • LOC 3475 • Part Works For
  
  870810549100 • View Detail • Free Shipping Eligible • Available: 1
  
  $41.75
- $41.75
  
  Qty
- v7531
- Bosch Aquastar 125FX Pilot Tube Gasket - 8700103173 - Non-returnable
  
  • LOC 3015 • Part Works For
  
  870010317300 • View Detail • Free Shipping Eligible • Available: 56
  
  $3.95
- $3.95
  
  Qty
- v7532
- Bosch Aquastar 125FX Electrovalve O-Ring - 8700205120 - Non-returnable
  
  • LOC 3040 • Part Works For
  
  870020512099 • View Detail • Free Shipping Eligible • Available: 2
  
  $4.95
- $4.95
  
  Qty
- v7542
- Bosch Aquastar 125FX Microswitch - 8707200007 - Non-returnable
  
  • Old Part Number 87072000070 • LOC 3385 • Part Works For
  
  870720000700 • View Detail • Free Shipping Eligible • Available: 5
  
  $43.75
- $43.75
  
  Qty
- v7545
- Bosch Aquastar 125FX Fan Protection - 8701302164 - Non-returnable
  
  • Drop Ship from Mfg • Part Works For
  
  870130216499 • View Detail • Free Shipping Eligible • Available: 3
  
  $54.00
- $54.00
  
  Qty
- v7548
- Bosch Aquastar 125FX Electric Control Box - 8707101021 - Non-returnable
  
  • Old Part Number 87071010210 • LOC 3973 • Part Works For
  
  870710102199 • View Detail • Free Ground Shipping • Available: 2
  
  $415.75
- $415.75
  
  Qty
- v7562
- Bosch Aquastar 125FX Water Valve PWV - 8707006361 - Non-returnable
  
  • Old Part Number 87070063610 • LOC 3380 • Part Works For
  
  870700636100 • View Detail • Free Ground Shipping • Available: 3
  
  $224.75
- $224.75
  
  Qty
- v7564
- Bosch Aquastar 125FX Volumetric Flow Governor - 8705705021 - Non-returnable
  
  • LOC 3350 • Part Works For
  
  870570502100 • View Detail • Free Shipping Eligible • Available: 3
  
  $66.75
- $66.75
  
  Qty
- v7587
- Bosch Aquastar 125FX Flue Gas Sensor - 8707206305 - Non-returnable
  
  • Old Part Number 87072063050 • LOC 3420 • Part Works For
  
  870720630500 • View Detail • Free Shipping Eligible • Available: 1
  
  $128.75
- $128.75
  
  Qty
- v7601
- Bosch Aquastar 125FX Electric Control Box - 8707207106 - Non-returnable
  
  • Old part number 87072071060 • LOC 3436 • Part Works For
  
  870720710699 • View Detail • Free Ground Shipping • Available: 4
  
  $349.75
- $349.75
  
  Qty
- v7609
- Bosch Aquastar 125FX Fuse T2.5A - 1904521342 - Non-returnable
  
  • LOC 3645 • Part Works For
  
  890452134299 • View Detail • Free Shipping Eligible • Available: 6
  
  $8.75
- $8.75
  
  Qty
- v7493
- Bosch Aquastar Piezo Electrode and Flame Rod Sensor - 87181070670 - Non-returnable
  
  • Old Part Number was 8708107006 • Includes Piezo Electrode and Flame Rod Sensor • LOC 3485 • Part Works For
  
  870810700600 • View Detail • Free Shipping Eligible • Available: 6
  
  $27.75
- $27.75
  
  Qty
- v7434
- Bosch Aquastar 125X Electronic Ignition Box - 8707207011 - Non-returnable
  
  • Also Known as Part Number 870720701100 • LOC 3435 • Part Works For
  
  870720701100 • View Detail • Free Shipping Eligible • Available: 5
  
  $189.75
- $189.75
  
  Qty
- v13255
- Bosch Aquastar 125B Regulator Natural Gas - LOC 3000 - 7738000883 - Non-returnable
  
  • Old Part Number 8342400000 • LOC 3000 • Part Works For
  
  834240000999 • View Detail • Free Shipping Eligible • Available: 3
  
  $67.75
- $67.75
  
  Qty
- v7076
- Bosch Aquastar 125B Water Valve Selector Screw - 8708500251 - Non-returnable
  
  • LOC 3536 • Part Works For
  
  870850025199 • View Detail • Free Shipping Eligible • Available: 7
  
  $36.95
- $36.95
  
  Qty
- v7558
- Bosch Water Valve Rebuild Kit 125FX with Brass Water Valve - 7738001915 - WVKIT125FXBWV - Non-returnable
  
  • Includes Parts 8707402015 2 of 8710103043 2 of 871 • and 2 of 87034011650 8703406244 8708503063 DOWLUBE • Kit does not include an Inlet Filter or a Water Valve Diaphragm • LOC 6210 • Part Works For
  
  WVKIT125FXB2 • View Detail • Free Shipping Eligible
  
  $97.75
- $97.75
  
  Qty
- v7557
- Bosch Aquastar 125FX Burner Assembly Washer - 8710103060 - Non-returnable
  
  • LOC 3571 • Part Works For
  
  871010306095 • View Detail • Free Shipping Eligible
  
  $4.95
- $4.95
  
  Qty

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