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Free Shipping on qualified orders over $599! Excluding HI, AK & Canada, and products marked Special Handling. *Some Items Excluded*
Free Shipping on qualified orders over $599! Excluding HI, AK & Canada, and products marked Special Handling. *Some Items Excluded*

Replacement Parts Viessmann

Viessmann Boiler Replacement Parts

Premium Viessmann replacement parts for boilers and heating systems. Maintain peak performance with authentic German-engineered components designed specifically for your Viessmann system.

Replacement Parts Catalog:

  • Electronic Controls: Control boards, display panels, and sensors
  • Combustion Components: Burners, gas valves, and ignition systems
  • Hydraulic Parts: Pumps, expansion vessels, and pressure components
  • Heat Transfer: Heat exchangers and circulation components
  • Safety Devices: Pressure relief valves, limit switches, and sensors

Viessmann Engineering Excellence

Every Viessmann replacement part meets rigorous quality standards. Using genuine parts ensures optimal efficiency, safety, and longevity while maintaining your system warranty.

Filters

  • Ignition Electrode B1HE,B1KE,B2HE 85/120

    Viessmann
    $0.00 - $0.00
    $0.00
    $96.20
    $96.20 - $96.20
    $96.20
    In stock

    SKU 7868 995

    $0.00 - $0.00
    $0.00
    $96.20
    $96.20 - $96.20
    $96.20

  • Ignition Electrode B1xE,B2HE 150/199

    Viessmann
    $0.00 - $0.00
    $0.00
    $197.50
    $197.50 - $197.50
    $197.50
    In stock

    SKU 7868 889

    $0.00 - $0.00
    $0.00
    $197.50
    $197.50 - $197.50
    $197.50

  • Insulating Ring, WB2A 44/60

    Viessmann
    $0.00 - $0.00
    $0.00
    $129.49
    $129.49 - $129.49
    $129.49
    In stock

    SKU 7828 347

    $0.00 - $0.00
    $0.00
    $129.49
    $129.49 - $129.49
    $129.49

  • Ionization Electrode (w Gskt)CU3A 94/125

    Viessmann
    $0.00 - $0.00
    $0.00
    $79.40
    $79.40 - $79.40
    $79.40
    In stock

    SKU 7834 233

    $0.00 - $0.00
    $0.00
    $79.40
    $79.40 - $79.40
    $79.40

  • Ionization Electrode B1xE,B2HE 150/199

    Viessmann
    $0.00 - $0.00
    $0.00
    $80.85
    $80.85 - $80.85
    $80.85
    In stock

    SKU 7868 890

    $0.00 - $0.00
    $0.00
    $80.85
    $80.85 - $80.85
    $80.85

  • Ionization Electrode B1xE,B2HE 85/120

    Viessmann
    $0.00 - $0.00
    $0.00
    $79.82
    $79.82 - $79.82
    $79.82
    In stock

    SKU 7868 997

    $0.00 - $0.00
    $0.00
    $79.82
    $79.82 - $79.82
    $79.82

  • Ionization Electrode CU3A 160/199

    Viessmann
    $0.00 - $0.00
    $0.00
    $61.40
    $61.40 - $61.40
    $61.40
    In stock

    SKU 7834 392

    $0.00 - $0.00
    $0.00
    $61.40
    $61.40 - $61.40
    $61.40

  • LOW LOSS HEADER SENSOR

    Viessmann
    $0.00 - $0.00
    $0.00
    $270.34
    $270.34 - $270.34
    $270.34
    In stock

    SKU 7134 240

    $0.00 - $0.00
    $0.00
    $270.34
    $270.34 - $270.34
    $270.34

  • PACKAGE OF HEMP (6g)

    Viessmann
    $0.00 - $0.00
    $0.00
    $5.73
    $5.73 - $5.73
    $5.73
    In stock

    SKU 7134 762

    $0.00 - $0.00
    $0.00
    $5.73
    $5.73 - $5.73
    $5.73

  • Part# discontinued - AKA 7134 626 - Replacement Cascade Control, 12VAC

    Viessmann
    $1,672.46 - $1,672.46
    $1,672.46
    $1,672.46 - $1,672.46
    $1,672.46
    In stock

    SKU 7134 517

    $1,672.46 - $1,672.46
    $1,672.46
    $1,672.46 - $1,672.46
    $1,672.46

  • Profile Clamp Vitosol (1 pce) for interconnection pipes & connection set

    Viessmann
    $0.00 - $0.00
    $0.00
    $14.07
    $14.07 - $14.07
    $14.07
    In stock

    SKU 7317 074

    $0.00 - $0.00
    $0.00
    $14.07
    $14.07 - $14.07
    $14.07

  • Pump Head (GF) UPS 15-48 w Implr

    Viessmann
    $0.00 - $0.00
    $0.00
    $397.05
    $397.05 - $397.05
    $397.05
    In stock

    SKU 7839 839

    $0.00 - $0.00
    $0.00
    $397.05
    $397.05 - $397.05
    $397.05

  • Pump Head (GF) UPS15-78 B1HA/B1KA

    Viessmann
    $0.00 - $0.00
    $0.00
    $353.05
    $353.05 - $353.05
    $353.05
    In stock

    SKU 7856 004

    Currently on back order

    $0.00 - $0.00
    $0.00
    $353.05
    $353.05 - $353.05
    $353.05

  • Pump Head (GF) UPS15-78 w Implr B2Tx

    Viessmann
    $0.00 - $0.00
    $0.00
    $397.05
    $397.05 - $397.05
    $397.05
    In stock

    SKU 7839 846

    $0.00 - $0.00
    $0.00
    $397.05
    $397.05 - $397.05
    $397.05

  • Radial Fan NR148 (w Gskts) CU3A 45/60

    Viessmann
    $0.00 - $0.00
    $0.00
    $625.25
    $625.25 - $625.25
    $625.25
    In stock

    SKU 7842 353

    $0.00 - $0.00
    $0.00
    $625.25
    $625.25 - $625.25
    $625.25

  • Radial Fan NRG118 (w Gskts) CU3A 26/35

    Viessmann
    $0.00 - $0.00
    $0.00
    $417.52
    $417.52 - $417.52
    $417.52
    In stock

    SKU 7842 352

    $0.00 - $0.00
    $0.00
    $417.52
    $417.52 - $417.52
    $417.52

  • Radial Fan RG148E 120/1/60 B2HA 45-60

    Viessmann
    $0.00 - $0.00
    $0.00
    $903.60
    $903.60 - $903.60
    $903.60
    In stock

    SKU 7839 705

    $0.00 - $0.00
    $0.00
    $903.60
    $903.60 - $903.60
    $903.60

  • Sensor #1 (outdoor, NTC)

    Viessmann
    $0.00 - $0.00
    $0.00
    $170.45
    $170.45 - $170.45
    $170.45
    In stock

    SKU 7837 053

    $0.00 - $0.00
    $0.00
    $170.45
    $170.45 - $170.45
    $170.45

  • Sensor #15 (Flue Gas, NTC) AKA 7822 767

    Viessmann
    $0.00 - $0.00
    $0.00
    $63.52
    $63.52 - $63.52
    $63.52
    In stock

    SKU 7856 088

    $0.00 - $0.00
    $0.00
    $63.52
    $63.52 - $63.52
    $63.52

  • Sensor #3 (Boiler) B2xx 68-125

    Viessmann
    $0.00 - $0.00
    $0.00
    $48.10
    $48.10 - $48.10
    $48.10
    In stock

    SKU 7839 726

    $0.00 - $0.00
    $0.00
    $48.10
    $48.10 - $48.10
    $48.10

  • Sensor #3 (Boiler, Set 2) B2Hx 160-530

    Viessmann
    $0.00 - $0.00
    $0.00
    $160.67
    $160.67 - $160.67
    $160.67
    In stock

    SKU 7835 112

    $0.00 - $0.00
    $0.00
    $160.67
    $160.67 - $160.67
    $160.67

  • Viessmann #5 DHW/buffer temperature sensor for Vitosolic 200 (no cable)

    Viessmann
    $0.00 - $0.00
    $0.00
    $175.03
    $175.03 - $175.03
    $175.03
    In stock

    SKU 7170 965

    $0.00 - $0.00
    $0.00
    $175.03
    $175.03 - $175.03
    $175.03

  • Viessmann 3" copper pipe adapter from metric to 3/4" pipe: Replaces 9543 379

    Viessmann
    $0.00 - $0.00
    $0.00
    $24.34
    $24.34 - $24.34
    $24.34
    In stock

    SKU 9543 380

    $0.00 - $0.00
    $0.00
    $24.34
    $24.34 - $24.34
    $24.34

  • Viessmann adaptor to CPVC, 60mm to 2"

    Viessmann
    $0.00 - $0.00
    $0.00
    $15.57
    $15.57 - $15.57
    $15.57
    In stock

    SKU 7134 769

    $0.00 - $0.00
    $0.00
    $15.57
    $15.57 - $15.57
    $15.57

  • Viessmann Comfortrol programming unit for Vitodens 200 WB2A

    Viessmann
    $0.00 - $0.00
    $0.00
    $841.27
    $841.27 - $841.27
    $841.27
    In stock

    SKU 7133 383

    Viessmann comfort control programing unit for Vitodens 200

    $0.00 - $0.00
    $0.00
    $841.27
    $841.27 - $841.27
    $841.27

  • Viessmann Flow Sensor 15/60 (WB2A-44/60) - REPLACES PART# 7817 683

    Viessmann
    $0.00 - $0.00
    $0.00
    $405.23
    $405.23 - $405.23
    $405.23
    In stock

    SKU 7843 834

    $0.00 - $0.00
    $0.00
    $405.23
    $405.23 - $405.23
    $405.23

  • Viessmann flue adapter for CPVC 110mm to 4"

    Viessmann
    $0.00 - $0.00
    $0.00
    $47.07
    $47.07 - $47.07
    $47.07
    In stock

    SKU 7134 771

    $0.00 - $0.00
    $0.00
    $47.07
    $47.07 - $47.07
    $47.07

  • Viessmann flue adapter for CPVC 3"

    Viessmann
    $0.00 - $0.00
    $0.00
    $28.90
    $28.90 - $28.90
    $28.90
    In stock

    SKU 7134 770

    $0.00 - $0.00
    $0.00
    $28.90
    $28.90 - $28.90
    $28.90

  • Viessmann Gas Valve CES w/gaskets - Replaces 7826 508

    Viessmann
    $0.00 - $0.00
    $0.00
    $295.36
    $295.36 - $295.36
    $295.36
    In stock

    SKU 7836 324

    $0.00 - $0.00
    $0.00
    $295.36
    $295.36 - $295.36
    $295.36

  • Viessmann gas valve without orfice for all Vitodens 200 WB2A boilers

    Viessmann
    $0.00 - $0.00
    $0.00
    $616.05
    $616.05 - $616.05
    $616.05
    In stock

    SKU 7134 747

    $0.00 - $0.00
    $0.00
    $616.05
    $616.05 - $616.05
    $616.05

  • Viessmann Ignition Electr. (w gskt) B2xA 19

    Viessmann
    $0.00 - $0.00
    $0.00
    $81.87
    $81.87 - $81.87
    $81.87
    In stock

    SKU 7826 515

    $0.00 - $0.00
    $0.00
    $81.87
    $81.87 - $81.87
    $81.87

  • Viessmann Ignition Electrode w Gskt B2HA 112-150

    Viessmann
    $0.00 - $0.00
    $0.00
    $86.81
    $86.81 - $86.81
    $86.81
    In stock

    SKU 7836 815

    $0.00 - $0.00
    $0.00
    $86.81
    $86.81 - $86.81
    $86.81

  • Viessmann Ionization Electr. w Gskt B2HA 45-100

    Viessmann
    $0.00 - $0.00
    $0.00
    $102.69
    $102.69 - $102.69
    $102.69
    In stock

    SKU 7836 489

    $0.00 - $0.00
    $0.00
    $102.69
    $102.69 - $102.69
    $102.69

  • Viessmann Ionization Electr.(w gskt) B2xA 28/35

    Viessmann
    $0.00 - $0.00
    $0.00
    $84.69
    $84.69 - $84.69
    $84.69
    In stock

    SKU 7839 451

    $0.00 - $0.00
    $0.00
    $84.69
    $84.69 - $84.69
    $84.69

  • Viessmann Ionization Electrode w Gsk WB2B-19/26/35 : Replaces 7826 518

    Viessmann
    $0.00 - $0.00
    $0.00
    $84.69
    $84.69 - $84.69
    $84.69
    In stock

    SKU 7834 234

    $0.00 - $0.00
    $0.00
    $84.69
    $84.69 - $84.69
    $84.69

  • Viessmann mounting hardware clamping bracket (6 per pack)

    Viessmann
    $0.00 - $0.00
    $0.00
    $79.82
    $79.82 - $79.82
    $79.82
    In stock

    SKU 7188 864

    $0.00 - $0.00
    $0.00
    $79.82
    $79.82 - $79.82
    $79.82