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Pool timer not working

Our timer gears are worn. Where can we get a replacement?

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When it is time for the timer to switch on at night, the red indicator stops right in the middle of on and off.

Plastic gears in this timer. after a while the cogs on the gears get worn until they do not mesh and the timer hangs up.
try shifting the timers time 12 hours. am becomes pm then change your timer pins to the same time but from am to pm or vice versa.
this gets you using another part of the main gear and the timer might work fine. if not you will need to replace the timer.

Jan 29, 2016 | Electric Intermatic Wh 21 Water Heater...

1 Answer

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:


If you need further help, I’m available over the phone at

May 20, 2014 | RTO Intermatic Inc Ej351c Timer Night...

2 Answers

Pool pump clock

T104M used WG1573 clock motor:
The timer mechanism has metal gears, while the clock motor has plastic gears. If the metal gears get dirty and bind, it will strip the plastic gears.
Turn off power, pull timer out of box, Clean out timer with compressed air, and spray WD40, add a bit of white grease to lever where trippers make contact, then replace clock motor ... and buy another set of trippers to have on-hand since they are designed to wear down so timer will last longer.
If timer body is broken so dial does not rotate, then buy new T104 and snap new mechanism into old box. Buying whole T104 with enclosure is cheaper than buying T104M mechanism only.

If you need further help, I’m available over the phone at

May 15, 2013 | Pool & Spa

1 Answer

Why is my timer runnung backwards

Timer is not identified.
Analog timers have clock motor.
If the gears strip out, then timer can run backwards.
Some timers have replaceable clock motors, such as Intermatic and Tork box timers, and pool timers.
While small plug in timers generally do not have replacement parts.

If you need further help, I’m available over the phone at

Jul 19, 2012 | Hardware & Accessories

1 Answer

I have a T10404R dual intermatic timer clock and I can only turn my pool pump on manually. The clock is working and it will turn off, but I can't get the ON pin to work despite replacing it with a new...

1) Troubleshoot walk-thru indicates that tripper is wrong, or timer mechanism is worn out:
Check that tripper is labeled ON, and compares similarly with old tripper, and is not worn down. Trippers are made of softer metal and designed to wear out before the timer mechanism wears out.

2) Buy new timer mechanism: If the new ON tripper does not push the on-off lever, then timer mechanism is probably worn out.
Buy new T104M mechanism, and change out with existing mechanism using thumb spring located top inside box.

3) How it works: The trippers rotate around on clock dial. Trippers come into contact with on-off lever, and trippers push lever.
On tripper pushes lever one direction. Off tripper pushes same lever other direction.
Each time the lever moves back and forth, the manual override also clicks with audible sound.
The lever moves a slide bar located on back of timer mechanism, and that action opens and closes electrical circuit.

4) Since any timer mechanism can fit into the T10404R control panel, you can also buy and install T104M210 timer mechanism with fireman's switch that turns off heater 20 minutes before turning off pool pump.
For 2-speed pool pump, the digital P1353 can also be installed, and this timer would replace both timing mechanisms in the T10404R. Non-electronic timers are more reliable.

5) Add a comment for more help

6) Take a moment and rate answer for accuracy:
And take advantage of fixya expert assistance live.
For a price, expert works with you while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

Sep 18, 2011 | Intermatic T10404R - Two 220 time clocks...

1 Answer

The timer clicked OFF but poot pump kept running. Had to trip breaker to stop pool pump.

Your Intermatic timer has a manual override.
The override is a good diagnostic.
Click the manual override and see if pump turns on and off.

Next, watch if the clock is rotating.
If the clock is rotating, the OFF tripper may be worn out and you need a new tripper


If the clock wheel is not rotating, you need a new clock motor.
If you have T104, your clock motor is 240Volts
If you have T101 or T103, your clock motor is 125Volts
Buy trippers and clock motors at Grainger
Clock motor replacement takes a small star-screwdriver bit

If your manual override is not working, then the gears might be rusty and need to be cleaned or your timer needs to be replaced.
You can buy same model number timer and then swap the insides without changing boxes.

Add a comment if you need more help.

Nov 02, 2010 | Intermatic & Indoor/Outdoor Rain Tight...

1 Answer

Intrametric T-101R timer used to turn a swimming pool pump on and off. The dial not longer turns so I need to manually turn the timer on and off. Manually it works fine, but the timer feature doesn't...

Check wires from timer motor to terminals. If you buy the same brand of timer, you can "pop" timer mechanism out and replace it with the new one you take out if it's enclosure. Be sure the tripper hands are on the dial.

Jun 15, 2010 | Intermatic & Indoor/Outdoor Rain Tight...

1 Answer

I have the double timer box one for pool and one

If you can rotate it by hand (without pulling it out to release the gears) then it is probably shot.

Jul 06, 2009 | Intermatic & Indoor/Outdoor Rain Tight...

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