I answer questions for free.
I specialize in timers and electrical devices
Below is the manual for the EJ351
http://www.intermatic.com/~/media/files/intermatic/products/instructions/timers/ej351c%20-%20english.ashxThe red light is a good indicator of the EJ351 timer.
The manuals says that you can clear all programming by moving control lever to OFF-CLEAR position for 20 seconds.
After programs are cleared, the red light will turn off.
Then move control lever to ON position,
and then red indicator light will start flashing.So the problem may be that the timer programs were accidentally cleared.
Use the instruction manual to re-program your timer.
Add a comment if you need more assistance, and I will help.