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The timer dial on my intermatic t101 does not work? the clock is powered but the dial does not move?

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  • 112 Answers

Clock motor is bad

to fix it you have to replace it, i would go with replacing the whole thing.

Posted on Mar 03, 2017


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Posted on Jan 02, 2017

  • 112 Answers

SOURCE: Once T101 Timer Shuts Off will not turn back on

you have the hot and load reversed. the power source should connect to terminal 1. the wire going on to the pool pump should be hooked to terminal 2.

the clock motor is powered off terminal 1 and A is the neutral.

what u have done is hooked the power source to #2 and the load to #1, simply switch them and everything should be fine, here is a link to the wiring diagram for the timer.

Posted on Aug 22, 2009

Testimonial: "Thank you so much for your comments. I followed what you said and it works like a charm! Thank you again."

  • 101 Answers

SOURCE: I have the Intermatic T101 24 Hr. The light come

Does the clock stop, or does the light just stay on? Without knowing any further information, you have a tripper that is set for the time to go, you should have one that is set to go off. Make sure you have both trippers set, and working. (ie. set one to go ON at 8:00 pm, and the other to go off at 8:30 pm). If so, then set them to your desired times - and try again.  Also, I'm not sure how long you've had this timer - because you could have a bad motor. If so, it's cheaper to buy a new timer - than try and buy a motor for it. Anyway, try the above information I gave you - and then let me know what happens. Any other information you can give me would be great. I hope the above info. helps you, but if not - we'll try Plan B. Good Luck! - JR

Posted on Jul 06, 2010

SOURCE: I am replacing an Intermatic

GE15600 replacement module snaps into standard Intermatic box.

Timers can be wired different ways. I know all these timers and have them sitting in my office.
I cannot see your timer or your wires, so read information below.
Open following link for clear crossover instructions:

If Intermatic timer has terminals A 1 2 3 4, then that is not traditional T101, but sounds like 120Volt T103.
T103 can be wired many different ways, and is not fully compatible with GE replacement.
If you have wires on all terminals A 1 2 3 4, then add a comment and say what wires you have and what loads you are controlling, for more detailed information.

For other folks who find this link, it is sometimes less expensive to repair T100 series Intermatic timer with $4 trippers and $20 clock motor.

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.

Posted on May 17, 2011

SOURCE: How do I program Intermatic Inc T101 timer?

Open following links:

Posted on Jun 28, 2011

SOURCE: T101 - 24 Hr. Dial Time Switch - NEMA 1 Indoor Steel Case - Gray: With my Intermatic T102, the manual on/off switch ...

Open following link for troubleshoot checklist

Posted on Jun 28, 2011

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How do I set T101 intermatic T101 timer to 7:30 PM

PROGRAMMING INSTRUCTIONS 1. TO SET "ON" AND "OFF" TIMES: Hold trippers against edge of CLOCKDIAL, pointing to time (AM or PM) when ON and OFF operations are desired, tighten tripper screws firmly. For additional tripper pairs on CLOCK-DIAL order 156T1978A. 2. TO SET TIME-OF-DAY: Pull CLOCK-DIAL outward. Turn in either direction and align the exact time-of-day on the CLOCK-DIAL (the time now, when switch is being put into operation) to the pointer. DO NOT MOVE POINTER.

Mar 23, 2017 | Intermatic Hardware & Accessories

1 Answer

Intermatic t101

99% chance the Timer wires are reversed ... and line from breaker and line to pump are reversed. Or remotely possibly the circuit is 240V, and somebody changed clock motor on old T101 from WG1570 to WG1573, converting old T101 into T102...
Add a comment with what you discover

May 14, 2013 | Hardware & Accessories

1 Answer

How can I tell if my t101 motor is not working

Connect 120Volts to white clock motor leads.

Blow out timer with compressed air.
Turn off power and spray highly flammable vapor from WD40 can onto gears.
If dial rotates and keeps good time, then buy new 156T1978A trippers

T101 timer comes stock with WG1570 120-480 volt clock motor.
Clock motor typically connects to terminals A and 1.
Hot black wire connects to terminal 1. Neutral white connects to terminal A.
Load wires: Black to terminal 2, and White to terminal A
This timer can be converted to other voltages by changing clock motor, such as 208-277Volt using WG1573. Or adapted to European, SE Asian 230 Volt 50Hz timer by installing WH1574.

Nov 28, 2012 | Intermatic T101R3 110 volt time clock in a...

1 Answer

My Intermatic T101 has power going to it and the clock works normally. But when the clock trips the switching lever to ON or I manually turn it to on, it does not put out power. Is there any sort of fuse...

There is no fuse inside the T101.
If timer clock motor is working correctly, then 120Volt circuit is fine up to the timer.
Unknown if this is new installation , or old installation that stopped working.
Wiring might be bad, such that line and load wires are reversed.
Or light bulb might be bad.
Copy following links to help narrow down problem:

Dec 13, 2011 | Intermatic T101 - 24 Hr. Dial Time Switch...

1 Answer

I just replaced my filters and turned on the power and now I get nothing?

More information is needed.
Question posted under Intermatic T101 120Volt timer. Timer model number appears on inside of timer door. Add a comment any time and it sends email and I will respond.

Open following link for Intermatic timer troubleshoot walk-thru:

When you turned off power, did you turn off circuit breaker? Or turn off manual override on timer?
If circuit breaker is turned on, does the timer dial rotate?
If timer dial rotates and keeps good time, then electricity to timer is good, timer clock motor is good.
If dial is rotating, what happens when you move override lever back and forth? Does load turn on?
Read through troubleshoot on link above and then add a comment with more details if needed.

Sep 17, 2011 | Intermatic T101 - 24 Hr. Dial Time Switch...

1 Answer

Intermatic T101 timer

T101 timer is strictly 120Volt timer
Wiring and manual show on following link

See another image of wiring:

Amazon sells T101:

If timer is not functioning, add a comment.

Grainger sells 125V clock motor and tripper for T100 series timers.
If manual override does not turn Load ON, and the lever snaps crisp and clean, then check electric circuit. Check if load is operable.
If override does not snap crisp and clean, then timer may be worn out.
If dial does not rotate, replace clock motor.
If dial rotates but does not click override back and forth, then replace trippers.

How T101 works:
Lift and rotate dial until current time lines up with silver pointer
Clock motor rotates dial.
ON-OFF trippers attached outer edge of dial contact a lever.
ON tripper pushes lever one direction.
Off tripper pushes lever opposite direction.
Lever opens and closes electrical contacts.
Lever also pushes manual override lever back and forth with audible click.

Dec 28, 2010 | Intermatic & Indoor/Outdoor Rain Tight...

1 Answer

I HAVE AN iNTERMATIC t100m TIMER it appears to have two "off" tripper levers but no "on" tripper lever attached to the clock face dial by a set screw . Do I need an "on "...

Yes, the T101M 120Volt pool timer requires both ON and OFF trippers:

Grainger sells T100 series on-off trippers:
Amazon sells T100 trippers

Grainger sells the T100 125V clock motor

How to wire T-101 120Volt timer

How Intermatic dial timer clock works.
Clock motor rotates dial.
Intermatic clock motor, located on back of mechanism, are replaceable
Trippers located on outer edge of dial push on-off lever
ON tripper pushes lever one direction
OFF tripper pushes lever opposite direction.
Lever pushes electrical contacts together and pulls contacts apart.
When lever moves, manual override also clicks back and forth with audible click.
To replace timer, replacement snaps into box without needing to changing box.

Dec 10, 2010 | Intermatic T101 - 24 Hr. Dial Time Switch...

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.

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.

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.

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.

Dec 04, 2010 | RTO Intermatic Inc Wg1573-10d Replacement...

1 Answer

How do I reset the time needle on my intermatic modle t101 The screw was loose and the needle move so

T101 Intermatic is 120Volt electro-mechanical timer

Silver pointer is located at 6:00 position.
Tighten the center screw with star screwdriver
Lift and rotate yellow dial until current time lines up with silver pointer.


How electro-mechanical timers work:
Place ON-OFF trippers on dial.
Trippers rotate around with passing time.
Trippers encounter on-off lever.
OFF tripper clicks lever one direction.
ON tripper clicks lever other direction.
Manual override lever clicks back and forth each time on-off lever is clicked.
How to wire T101:


Nov 16, 2010 | Intermatic T101 - 24 Hr. Dial Time Switch...

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