Junkers W255 / Wr275 heater and Zw20 boiler micro switch, part number 87072000070
Junkers boiler heater microswitch
The problems that can arise from having a faulty Junkers heater microswitch include ignition failures. It may ignite intermittently, fail to spark, produce a weak spark, etc.
If your heater is old and you need it with wiring (which we recommend), this would be the right one
Anyway, check the tab below for compatible models.
| 7700431976 | W135KV1B31S2805 |
| 7700431977 | W135KV1B31S2806 |
| 7700431980 | W135KV1B31S2895 |
| 7700431975 | W135KV1B31S2896 |
| 7700451955 | W135V1B31S2806 |
| 7700431943 | W135-9KV1B31S2806 |
| 7700431955 | W135-9KV1B31S2896 |
| 7700451943 | W135-9V1B31S2806 |
| 7701331859 | W275-1KVM1P23S2895 |
| 7701431765 | W275-1KVM1P31S2895 |
| 7701331922 | W275-1KV1B23S2805 |
| 7701331917 | W275-1KV1B23S2895 |
| 7701431844 | W275-1KV1B31S2805 |
| 7701431839 | W275-1KV1B31S2806 |
| 7701431836 | W275-1KV1B31S2895 |
| 7701431823 | W275-1KV1B31S2896 |
| 7702331924 | W350-1KV1B23S2895 |
| 7702431842 | W350-1KV1B31S2805 |
| 7702431843 | W350-1KV1B31S2895 |
| 7713231825 | ZW20AME23S2805 |
| 7713244870 | ZW20AME31S2805 |
| 7713230070 | ZW20KD23S2805 |
| 7713230065 | ZW20KD23S2895 |
| 7713243070 | ZW20KD31S2805 |
| 7713243067 | ZW20KD31S2895 |
| 7713230856 | ZW20KE23S2805 |
| 7713230857 | ZW20KE23S2895 |
| 7713243863 | ZW20KE31S2805 |
| 7713243864 | ZW20KE31S2895 |
| 7713231838 | ZW20-1AME23S2805 |
| 7713244867 | ZW20-1AME31S2805 |
| 7713230080 | ZW20-1KD23S2805 |
| 7713230079 | ZW20-1KD23S2895 |
| 7713243072 | ZW20-1KD31S2805 |
| 7713243071 | ZW20-1KD31S2895 |
| 7713230860 | ZW20-1KE23S2805 |
| 7713230868 | ZW20-1KE23S2895 |
| 7713243868 | ZW20-1KE31S2805 |
| 7713243869 | ZW20-1KE31S2895 |
| 7713231801 | ZW20-2AME23S2805 |
| 7713244848 | ZW20-2AME31S2805 |
| 7713230104 | ZW20-2KD23S2895 |
| 7713243092 | ZW20-2KD31S2895 |
| 7713230837 | ZW20-2KE23S2895 |
| 7713243852 | ZW20-2KE31S2895 |
| 7701431707 | WRN11-1 KIB7 S2805 |
| 7701431706 | WRN11-1 KIB7 S2895 |
| 7701331798 | WRN11-1 KIN7 S2895 |
| 7700431956 | W 135-9 KV1 B 31 |
| 7701311018 | WR250-3AM1E23S3505 |
| 7701411017 | WR250-3AM1E31S3505 |
| 7701311027 | WR250-5AM1E23S3505 |
| 7701411026 | WR250-5AM1E31S3505 |
| 7701331924 | WR275-1KD1B23S3500 |
| 7701331914 | WR275-1KD1B23S3592 |
| 7701431846 | WR275-1KV1B31S3500 |
| 7701431834 | WR275-1KV1B31S3592 |
| 7701331860 | WR275-3KDM1E23S3595 |
| 7701331901 | WR275-3KD1B23S3595 |
| 7701431766 | WR275-3KVM1E31S3595 |
| 7701431816 | WR275-3KV1B31S3595 |
| 7701331822 | WR275-6KD1B23S3595 |
| 7701431731 | WR275-6KV1B31S3595 |
| 7701331836 | WR300-3KDM1E23S3595 |
| 7701431743 | WR300-3KVM1E31S3595 |
| 7701331821 | WR300-6KDM1E23S3595 |
| 7701431730 | WR300-6KVM1E31S3595 |
| 7701331784 | WR300-7KDM1E23S3595 |
| 7701431685 | WR300-7KVM1E31S3595 |
| 7702311016 | WR325-3AM1E23S3505 |
| 7702411014 | WR325-3AM1E31S3505 |
| 7702311029 | WR325-5AM1E23S3505 |
| 7702411029 | WR325-5AM1E31S3505 |
| 7702331937 | WR350-1KD1B23S3500 |
| 7702331932 | WR350-1KD1B23S3592 |
| 7702431863 | WR350-1KV1B31S3500 |
| 7702431858 | WR350-1KV1B31S3592 |
| 7702331921 | WR350-3KD1B23S3595 |
| 7702431841 | WR350-3KV1B31S3595 |
| 7702331864 | WR350-6KD1B23S3595 |
| 7702431784 | WR350-6KV1B31S3595 |
| 7703331970 | WR400-1KD1B23S3500 |
| 7703331962 | WR400-1KD1B23S3592 |
| 7703431941 | WR400-1KV1B31S3500 |
| 7703431933 | WR400-1KV1B31S3592 |
| 7703331953 | WR400-3KD1B23S3595 |
| 7703431922 | WR400-3KV1B31S3595 |
| 7703331913 | WR440-3KD1B23S3595 |
| 7703431877 | WR440-3KV1B31S3595 |
| 7703331907 | WR440-6KD1B23S3595 |
| 7703431871 | WR440-6KV1B31S3595 |
| 7703331904 | WR500-6KDM1E23S3595 |
| 7703431868 | WR500-6KVM1E31S3595 |
| 7703331875 | WR500-7KDM1E23S3595 |
| 7703431841 | WR500-7KVM1E31S3595 |
| 7700431979 | W125KV1B31S3595 |
| 7700331981 | W125-4KV1B23S3595 |
| 7700431971 | W125-4KV1B31S3595 |
| 7700331973 | W125-9KV1B23S3595 |
| 7701331864 | W275-1KVM1P23S3595 |
| 7701431770 | W275-1KVM1P31S3595 |
| 7701331912 | W275-1KV1B23S3595 |
| 7701431837 | W275-1KV1B31S3505 |
| 7701431838 | W275-1KV1B31S3506 |
| 7701431831 | W275-1KV1B31S3595 |
| 7701331863 | W275-4KV1B23S3595 |
| 7701431769 | W275-4KV1B31S3595 |
| 7702331929 | W350-1KV1B23S3595 |
| 7702431855 | W350-1KV1B31S3595 |
| 7702331891 | W350-4KV1B23S3595 |
| 7702431807 | W350-4KV1B31S3595 |
| 7703331959 | W400-1KV1B23S3595 |
| 7703431931 | W400-1KV1B31S3595 |
| 7703331929 | W400-4KV1B23S3595 |
| 7703431895 | W400-4KV1B31S3595 |
| 7713230067 | ZW20KD23S3595 |
| 7713243068 | ZW20KD31S3595 |
| 7713231829 | ZW20-1AME23S3505 |
| 7713244864 | ZW20-1AME31S3505 |
| 7713230082 | ZW20-1KD23S3595 |
| 7713243074 | ZW20-1KD31S3595 |
| 7713230858 | ZW20-1KE23S3595 |
| 7713243865 | ZW20-1KE31S3595 |









Duarte Silva –
reset the ignition immediately on my Junkers WR275
Luis Fernando Ortega Pérez –
The boiler wouldn't ignite properly until I replaced the microswitch. Now it starts without any problems