Question about Intermatic Timer T-101 Indoor 120-Volt 40-Amp 1 Pole Timer

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Intermatic T 101 24 Hour Dial Tine Switch Does Not Turn On

The Switch controls my pool sweep operation and has been in place since 1995. It is properly protected and sealed, and is in good condition. 2 days ago the ON tripper began failing to turn on the sweep although the OFF tripper continues to work normally. The clock dial and timing mechanism works properly and the clock keeps time accurately. I replaced the ON tripper but the pump still does not turn on. Using the On-Off Lever manually, it moves easily and smoothly from Off to ON and Off without any undue resistance.

I suspect the On-Off lever may be worn and no longer makes solid contact with the ON tripper, but I can't see it tell for sure. So, my questions are:

1. Is a worn lever contact the probable issue or coulsd there be another problem?

2. If a worn lever is the likely issue, can the time pointer and time dial be removed to provide access to the top of the manual lever?

3. If so and the lever is worn, can the lever be replaced?

4. If 2 & 3 are possible, does it make sense to replace the lever or should the entire switch be replaced?

Any advice will be appreciated and thanks in advance for the help.


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Its 10 years old, replace the whole timer switch

Posted on Jun 18, 2009


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What position is lever on intermatic pool timer t104p3 for timer to work?

Lever automatically moves back and forth as trippers pass.
Move lever to ON position, move to the right.
If timer dial is not rotating, then check wiring, or replace clock motor:
If timer worked before and stopped working, but dial still rotates, the trippers are worn down, replace trippers:


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Can't tell what is new, and what is not working. Add a comment.

You have a new timer with same problem as old timer.
And you have a new control box and switch.
At your new house.
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The instructions are available from Intermatic if you click on the below link.

240 volts will have two 120 volt lines and a ground(green or bare) or neutral (white) wire.

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Does the manual override turn Load ON-OFF? If manual override is broken or doesn't operate, it may be time to buy new timer mechanism and snap into existing box.
Do timer dials rotate as time passes? Do dials keep proper time? If not, you need new clock motor. Grainger sells clock motors and trippers:
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