Intermatic timer

[jcasstevens]

2-circuit timer and manual switch won't turn the main pump on/off.
The 2nd switch/timer operates fine and will turn the booster/cleaner pump off.
Main pump only shuts off when the breaker is turned off.
Clock is working.

 

[ajw22]

Welcome to TFP.

What model timer mechanisms do you have?

Post pics of the label on the door and the timers showing the wiring exposed.

 

[jcasstevens]

Model PF1202T

 

[ajw22]

Replace the left side timer with the Intermatic T104M.

 

[1poolman1]

2-circuit timer and manual switch won't turn the main pump on/off.
The 2nd switch/timer operates fine and will turn the booster/cleaner pump off.
Main pump only shuts off when the breaker is turned off.
Clock is working.

Freeze protection circuit may be activated/stuck even at higher temperature (they do break). The contacts in the first time clock can become "welded," stuck together, does happen though very rare with a T104M. Have seen a build-up of ants in the back of a time clock force the contacts closed.
Turn the breaker off, push up the small tab at the top of the mechanism to release it and pull it forward to see what's happening with the contacts. Be sure the mechanism is returned to its proper mounted position when done.

 

[jcasstevens]

Freeze protection circuit may be activated/stuck even at higher temperature (they do break). The contacts in the first time clock can become "welded," stuck together, does happen though very rare with a T104M. Have seen a build-up of ants in the back of a time clock force the contacts closed.
Turn the breaker off, push up the small tab at the top of the mechanism to release it and pull it forward to see what's happening with the contacts. Be sure the mechanism is returned to its proper mounted position when done.

Checked all that and all looks normal. Nothing looked abnormal with the freeze protection wiring and device. Checked and tightened all the lugs. Clock is still running. The switch appears to engage when flipped, but no change. Always on when breaker turned on. Replace the whole timer mechanism?

 

[1poolman1]

Checked all that and all looks normal. Nothing looked abnormal with the freeze protection wiring and device. Checked and tightened all the lugs. Clock is still running. The switch appears to engage when flipped, but no change. Always on when breaker turned on. Replace the whole timer mechanism?View attachment 495399

You need to trace the blue and black wire on the terminal block, find out what is powering them. Test for voltage on the terminal block as it also feeds the pump.