Having trouble with you Intermatic DT620 Astronomical Timer?
This page will help you with Intermatic DT620 programming and battery replacement.
Intermatic DT620 Astronomical Timer
Click here to see a video that will show you you how to program it easily.
Also, if your timer has been installed for a long time we recommend you change the batteries. This page shows how to change them.
These batteries are the ones that the DT620 timer uses.
Keep in mind your timer can be removed from the timer so you can pull it straight out and take it inside which will make things easier.
But if you want us to do all of this we’re are happy to help.
The cost is $94 for dispatch fee and $75 for the reprogram/battery change.