Rain Dial Transformer Test After Power Outage

Rain Dial (600/900/1200) dead after outage. New 9V battery and known-good outlet don't help. Test the transformer.

Test

1. Multimeter → AC 200V.
2. Measure across two yellow low-voltage wires at controller.
3. 22–26 VAC = transformer OK. Controller board likely failed.
4. 0 VAC = transformer dead. Replace.

Replacement Specs

• 24 VAC, 0.5–1.0 Amp (20–40 VA)
• Available at irrigation suppliers (Ewing, SiteOne, John Deere)
• ~$20–$30

Don't guess—test first. Transformer is the most common outage casualty.