Question about Intermatic T101 - 24 Hr. Dial Time Switch - NEMA 1 Indoor Steel Case - Gray

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Clock Stopped Turning

My timer clock on my pool has been working fine for the last 19 years, but now the dial won't turn. I have to start it manually and set the time. When I check it a few hours later, the time is still set to the previous time set and the dial didn't turn. Any ideas what cause this?

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Most likely, the timer motor has failed and needs to be replaced. As the timer motor is constantly running 24/7, getting 19 years of use is significant and is well beyond the typical life of a mechanical timer of this type. I know, I've got the same ones on my pool and usually have to replace them every 10-12 years.

As the timer IS 19+ years old, it would be best to replace the entire unit instead of looking to tyr to get just a replacement timer motor, since the cost for a new timer isn't all that much compared to the cost for just the motor.

Intermatic also makes a digital timer version of this type of timer, but for the relatively low price of a new, replacement mechanical timer, it might be a good idea to get another one like you have and expect another long working life.

Sorry that there really isn't much to repair in such an old timer, since the motor is the critical part.

The replacement should be easy to do yourself, just remember to turn off the power breaker and disconnect the power to the timer. All you need to do is exchange the wires into the new replacement timer I find that taking a picture of the timer as it is, will help you get the connections correct for the new timer.

Also, check the model number of your present timer and voltage, (some pool equipment is 100V-AC while others are 220V-AC) to get the correct replacment timer.

Hope you find this Very Helpful and best regards.

Posted on Sep 09, 2009

Testimonial: "Thanks. I took it apart and found the motor and replaced it for a cost of $35! Found out later the timer was install in 1979, 30 years of service!"

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My pool timer does not turn on at the scheduled time. Clock works fine until it gets to the start time and then seems to hang up and not activate. If manually activated it works fine and turns off on...


Intermatic? Sounds like 120Volt WG1570 clock motor or 240Volt WG1573 clock motor has gotten bad and needs replacement. This would cause tripper to stall, and motor will eventually cause stop.
Copy following links to identify available parts and troubleshoot resources:
http://waterheatertimer.org/Intermatic-trippers-and-parts.html#T100
http://waterheatertimer.org/How-to-troubleshoot-Intermatic-timer.html
Remove trippers from dial, and operate pump manually until replacement motor arrives. Order extra trippers also, since they are made of soft metal and designed to wear down so timer mechanism will last decades.
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Aug 05, 2013 | Coleman Cable Hardware & Accessories

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I have had a T103 running my pool pump for the last several years. All of a sudden the timer would switch on but not off. It was like the dial did not have enough torque to force it to switch and would...


1) T103 is 120Volt timer that can control multiple loads and different voltages..
If new timer dial stops turning after the tripper passes, then wiring from circuit breaker is probably reversed with wiring going to pump.
Open following link to identify correct wiring:
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T103

2) Add a comment for specific help with wiring, and I will respond.
Give details of pump voltage, and description of each wire.

3) To fix old timer, Replace 3-watt, 120Volt WG1570 clock motor.
Open following link for illustrations showing how to replace clock motor:
http://waterheatertimer.org/How-to-troubleshoot-Intermatic-timer.html#clock

4) Take a moment and rate answer:
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Sep 05, 2011 | Intermatic T103 Indoor 120-Volt 40-amp...

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Hi - My Intermatic T101P3 timer motor stops after it turns off the pool pump. I have one start and one stop time in a 24 hr period. I have to manually start the pump at the timer in the morning,...


Sounds like the clock leads are on the wrong posts, or at least the hot one is. If if was moved to the load side then manually starting the timer will also power up the clock motor. As soon as the clock trips the off timer, the pump and the clock motor are both off. Examine the clock leads to the wiring diagram inside the clock box cover to ensure they are connected correctly. I bet you'll find one of the wires is misplaced.

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Aug 31, 2011 | Intermatic T101P3 Pool Timer IndoorOutdoor...

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My Tork 1101 24 hr timer has stopped working. I hear it running, but the clock will not turn. I have to turn it on and off manually for my pool pump. This happened 2 years ago, then the following year...


You might need $45 clock motor for for Tork 1101 120Volt.
http://www.frontierlighting.com/product.jsp?part=10431&process=search&show=&&gdftrk=gdfV22514_a_7c834_a_7c3267_a_7c10431

Open following link to identify timer and see replacement clock motor and trippers:
http://waterheatertimer.org/Tork-timers-and-manuals.html#1101

Intermatic crossover shows T101 timer replaces 120Volt Tork 1101.
Amazon sells new Intermatic timer for $45 with super shipping
http://www.amazon.com/Intermatic-T101-Hour-Dial-Timer/dp/B00002N5FN

Crossover wiring from Tork to Intermatic:
Black wire on Tork L and 1 connect to Intermatic terminal 1
White wires on Tork X connect to Intermatic terminal A
Black wire on Tork 2 connects to Intermatic terminal 2
http://waterheatertimer.org/How-to-wire-T104-Intermatuic-timer.html#T101

Add a comment for more help

Upvote the help.
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.

Jun 04, 2011 | Vacuums

1 Answer

I have an intermatic T104P3 timer for my pool and now it won't turn on. I have to start the pool on manual. I have tryed to remove the screw to start and it goes right by it and does not set the pool on....


Hi Dianna, I am timer expert at Fixya

1) When you say screw, I believe you mean tripper?
geno_3245_273.jpg

2) Trippers are placed on dial using thumb screw. Clock motor located on back of mechanism rotates dial. So dial rotates as time passes.
On-off trippers rotate around on the dial and push a lever back and forth that turns pump on-off.
Trippers are designed to wear down so that timer mechanism lasts longer.
You can buy replacement trippers for T100 series timers at Grainger:
http://www.grainger.com/Grainger/timer-accessories/timers/electrical/ecatalog/N-8hi

3) You posted under T104 timer.
Notice that grainger also sells WG1573 240Volt clock motors for the T104.
Clock motors slow down and burn out.
Clock motors are replaced by tipping mechanism out of box using thumb spring located inside box at top. Clock motor is attached with 2 small star screws. Buy star screwdriver at auto parts or hardware.
When ordering trippers, you might want extra clock motor on hand for when the dial stops rotating.

4) Open following link to see manual and wiring instructions for T104.
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html

Add a comment for more free help.
Also take advantage of fixya phone service.
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Feb 10, 2011 | Intermatic T104 24h 208-277v Mechanical...

1 Answer

1 year old t101m timer stopped working. The manual on/off works but mechanical clock doesn't. Is there an easy fix or should I just repalce?


T101 dial is not working so the 125V clock motor needs to be replaced:
Grainger sells 125V T100 series clock motor:
http://www.grainger.com/Grainger/INTERMATIC-Time-Clock-Motor-1PNK1?Pid=search

Timer mechanism releases from box with metal spring located inside top of box.
Clock motor is attached with 2 star screws.
Notice clock motor has plastic gears, but timer has metal gears.
Metal gears on timer mechanism last for many years.

Notice also that clock motor wires connect to terminals A and 1.
After installing new motor, tighten screws very tight against copper wire.

Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, fixya expert speaks with you over phone while you work on timer.

Jan 05, 2011 | RTO Intermatic T101M Timer Mechanism Only...

1 Answer

My Intermatic timer is not working. I replaced the WG1573-10D motor but still it does not work. The manual override works so the power supply is ok. Any suggestions welcome.


Your question doesn't provide enough information.

You have 240Volt T104 Intermatic timer?
A) WG1573 is for 240 volt timer. If you have T101 or T103 timer, it takes 125V clock motor.
http://www.grainger.com/Grainger/INTERMATIC-Time-Clock-Motor-1PNK1?Pid=search

B) This is new installation? and clock motor only worked when override was ON, so you bought new clock motor. But actual problem is that wires from Load and Breaker are reversed.
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html

C) Your timer worked fine in past years, but dial stopped rotating so you bought new clock motor?
You replaced clock motor.
Manual override works.

--And then your information ends.
Does clock motor work? Does the dial turn? Are your on-off trippers on the dial?
Are tripper worn down?
Buy new trippers.
http://www.grainger.com/Grainger/INTERMATIC-Timer-Tripper-2E054?Pid=search

If clock motor does not work, and circuit is 240Volts, then I suspect you connected clock motor to wrong terminals>? Clock motor connects to terminals 1 and 3.

Add a comment and fill in details so we can properly troubleshoot.

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1 Answer

The clock has stopped. I have to turn it manually. Its an outdoor timer with a cover.


If the clock dial does not rotate >> and the manual override works >> the the clock motor is bad.

The clock motor is replaceable. Snap out the insides, and the clock is attached with 2 small screws >>> sometimes these take a start screwdriver from the auto parts store.

On the inside cover of your timer is a sheet showing the clock voltage. Some clocks are 240 Volts, some are 120 Volts.

The back of the clock also has identifying numbers.

You say the timer is outdoor. A pool timer is probably 240Volt timer, with a 240Volt clock.
If the timer controls the sprinkler or lights, then the clock motor is probably 120V, with 120V clock motor

Grainger sells 120 and 240 clocks for the T100 series timer
http://www.grainger.com/Grainger/wwg/search.shtml?searchQuery=Wh40&op=search&Ntt=Wh40&N=0&sst=subset

A+ sells a long list of Intermatic clock motors
http://www.aplussupply.com/intermatic/timermotors.htm

If your timer is an Intermatic, you can also buy the whole timer, and then swap the insides without changing the box.

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Clock does not work to turn pool filter on and off. do I need a new timer mechanism or clock motor


Things to check:

1) Is yellow dial rotating? If not, then clock motor is probably bad. T-100 240V time clock motor sells for $16 at grainger.
Also timer may not be getting 240V so check manual override.

2) If clock motor is turning, but manual override never clicks on-and-off, then pins are probably worn out. Buy pins at grainger

3) Does manual override work? Does it click crisp? If manual override clicks crisp on-and-off, and pool filter turns on-and-off normally, then a) the circuit is getting 240V and b) the timer mechanism is ok ... so clock motor is probably bad.

4) If manual override snaps crisp but pool timer does not turn on, then then circuit breaker could be bad, wire is loose, motor has gone bad
Test for 240 across poles 1 and 2
... or timer contacts are worn out & you need new T-104
See back of mechanical timer

5) If manual override is loose or sluggish, then you need new T104. You can buy a T-104, T-104R, T-104M etc ... and the interior body will snap into old box.

Note: Do not buy T-101 or T-103 as these have 120V motor.

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1 Answer

Turned off main circuit breaker for maintenance for issue not related to pool and failed to turn off pool pump. After the restoring power the pump stopped working. I tried to turn on the intermatic timer...


OK .. first check the breaker in the main electrical panel, make certain that it is retset, then the breakers in the pool disconnect, making sure they are reset and feeding power to the pump. Oh just so there is no confusion. when resetting a breaker, press firmly to off , then back to on .. if the timer will opperate the clock dial , then it should be good with turning on the pump.

Apr 15, 2010 | Intermatic Timer T12404R Pool & Spa...

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