| Electronics > Repair |
| What resistor ohm will work better to repair this waterpik? |
| (1/3) > >> |
| artvandalai:
The resistor on this waterpik blew. I changed it with the a similar spec 47ohm 2 watt yageo resistor but it still keeps blowing the resistor. Checking with the multimeter the motor, capacitor, diodes, and thermal fuse all checked normal. Will a higher ohm resistor work better? What ohm resistor will work better to repair this waterpik? This video is showing the repair with a 56 ohm resistor |
| fzabkar:
Was the original resistor a fusible safety type? https://www.digikey.com/en/product-highlight/y/yageo/fusible-through-hole-resistors I suspect that there may be carbon dust between the commutator segments. Can the motor be disassembled? |
| Simmed:
use 2x 100R or 3x 150R spread the power |
| DavidAlfa:
Maybe something is wrong in the mechanical part, overloading the motor? |
| fzabkar:
Teardown: https://newscrewdriver.com/2022/07/11/waterpik-wp-150w-teardown/ New motor (DF315XLG) for ~US$10: https://www.aliexpress.com/item/1005005779645234.html Rating of Waterpik is 120V, 16.4W. Current draw is ... I = 16.4 W / 120 V = 0.137 A Dissipation in resistor is ... P = I^2 x 47 ohms = 0.88W |
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