DewBuster™ Controller Technical Bulletin
Short in Heater RCA Plug.
On some Kendrick Heaters, repeated tugging and flexing of the cable may cause the connections inside the RCA plug to intermittently touch, causing a short circuit.
NOTE: This procedure is highly recommended to maximize the reliability of your equipment, however if your heater is under warranty, these modifications may affect your heater warranty.
Unscrew the barrel of the RCA plug and slide it out of the way. Inspect the connector to insure the heat shrink is only around the center conductor:
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GOOD: Heat Shrink Insulation is only on center terminal and prevents it from touching outer terminal. |
If only the center solder connection is covered with heat shrink like the photo above then you do not have a problem. Slide the outer heat shrink back over the connections and screw the barrel back on. You are finished with this heater, but be sure to check your others.
If the connections look like either of the photos below, then the plug can short and you should insulate it as directed below.
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BAD: Heat Shrink Insulation is on outside of connections where it can not prevent the terminals from touching together. |
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The black heat shrink serves only as a strain relief, it will not prevent the terminals from touching because it is on the outside of the terminals and does not keep them separated. If the heat shrink covers the terminals, slide it back to reveal the electrical connections within.
The photo above shows what is beneath the heat shrink, the terminals are almost touching and can short when the cable is flexed.
The photo above shows the RCA plug after wrapping electrical tape around the center terminal. This prevents the center terminal from coming into contact with any other parts of the plug. The outer terminal does not have to be insulated since it is connected to the plug housing anyway
If you have any questions, e-mail me for assistance.
