Question
OK.  I did something really stupid.  I replaced a blown fuse with the wrong size.  Now the controller does not get power.  Do I need to replace the controller or the transformer?

Answer
Hi Deanna,

Seems you need to replace the controller, but see what the manual say about:


Display shows
"PR OFF "
Fuse has blown Replace the fuse with one of the same amperage rating.
Use the MAN START / ADV button to run a watering program
Press MAN START / ADV to cycle through each station;
if the fuse blows again on a particular station, that station's
solenoid or field wires may have a short circuit that
needs repair.

Display is blank
If the controller is still receiving power, an electrical surge exceeding
the controller's built-in surge protection may have damaged the controller's microprocessor
Shut off power to the controller, open the lower face panel,
and disconnect the battery. Let the controller "rest" for about
5 minutes

Reinstall the battery and turn power back on. If numbers and
letters return to the display, the power surge did not do permanent
damage: reprogram the controller.
If the display remains blank, the ESP may be permanently
damaged. Call 1-800-RAIN-BIRD for a service referral.

Good Luck
Guillermo