How to reset a Watchman

A Watchman is an automated heating oil tank gauge which is fitted in your heating oil tank and sends a radio signal to a digital readout in your home. This allows you to easily monitor the heating oil levels in your tank and prevent run outs.

To reset your watchman:

  1. Switch the Watchman on and off. You will see a serial number followed  by a lower case R which stands for Reset.
  2. Unscrew and remove the power tube (battery) wait for 2 minutes and then screw the battery back on. Turn on the unit inside. This should reboot the system.
  3. Within a few minutes the Watchman should display the level of domestic heating oil in your tank.

What the signs mean:

F = Full Red Light Flashing = No Signal Red Flashing Light = Tank is low on fuel Fluid Level Low & “BAT LOW” = New power tube needed C = Connection fault replacement needed

 To Change the Watchman battery:

  1. Switch off your Watchman display in the house
  2. Unscrew your existing battery from the transmitter on the tank
  3. Fit the new battery. Wait for 5 minutes
  4. Switch your Watchman display back on

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OilFox is our easy and reliable way to monitor and manage your heating oil 24/7 with a handy app on your phone. Click here to find out more.


OilFox app example screenshot