Question about Intermatic & Indoor/Outdoor Rain Tight Timer

2 Answers

Have model T103 Intermatic Timer that have been turning on the store lights for the past 20 years. Recently the timer does not turn the lights on in the morning and I have to manually flip the switch to "On". However the timer does turn the lights off at night. Clock is working - can see the gears turning. Wiring is not disturbed or loose. Any suggestions greatly appreciate it.

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2 Answers

Sounds like you need new ON pin
http://www.grainger.com/Grainger/INTERMATIC-Timer-Tripper-2E054?Pid=search

Have model T103 Intermatic Timer that have been - d3c9f33.jpg

The ON-OFF pins rotate around until they come in contact with a lever. The clock motor pushes the pin forward until it clicks the on-off lever. The pins are softer metal than the lever, so the pins wear out.

If you need a new T-103 timer some day > the new timer mechanism can snap right into the old box without changing boxes.

If the dial is not rotating, then you can replace the T100 series 125 Volt clock motor (the T103 clock motor is 125V)
http://www.grainger.com/Grainger/wwg/search.shtml?searchQuery=Wh40&op=search&Ntt=Wh40&N=0&sst=subset

Posted on Oct 13, 2010

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Model T103 cant get timer to turn on and off

Posted on Mar 16, 2011

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1 Answer

Why is building entrance light not working?


The timer may be working, but the switch has failed. This is a common failure of electro-mechanical timers.

Mar 10, 2016 | Intermatic T103 Indoor 120-Volt 40-amp...

1 Answer

Need t173 part for intermatic hot water heater timer


Open following link for T100 series parts:
http://waterheatertimer.org/Intermatic-trippers-and-parts.html#T100
The T173 timer is 120Volts and wires same as T103.
Only difference between T173 and T103, is the T173 has day-skipper wheel
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T103

Jun 24, 2012 | Intermatic T101 - 24 Hr. Dial Time Switch...

1 Answer

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:
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 05, 2011 | Intermatic T103 Indoor 120-Volt 40-amp...

1 Answer

My Intermatic T103 Indoor 120-Volt 40-amp timer emits a constant peeping sound


Intermatic T103 is mechanical timer with moving gears.
Timer makes audible sound when tripper clicks on-off, but it should not make constant noise unless gears are causing noise.
Turn off power and spray WD-40 on gears and see if problem continues.
WD-40 vapor is extremely flammable hydrocarbon when sprayed, and should not be sprayed on live electric circuits.
If problem continues, turn off power, pull mechanism out and spray WD-40 on plastic gears of clock motor.
Open following links for illustrations of clock motor and removing mechanism.
http://waterheatertimer.org/images/WH40-005-gears-350.jpg
http://waterheatertimer.org/How-to-troubleshoot-Intermatic-timer.html

Aug 12, 2011 | Intermatic T103 Indoor 120-Volt 40-amp...

3 Answers

Can I used the T103M dpst spst timer for christmas lights? I would be coming off 2 20amps breakers in a single slot. I relly don't understand what a dpst and spst are (what they do) I am trying to hook up...


T103M is 120Volt timer that can handle all the Christmas lights.
Minimum on-off time 1 hour.
Rotate dial until current time lines up with silver pointer.
Set on-off trippers on dial.
Let's go step by step.

1) T103 has terminals A 1 2 3 4 >> terminals are also called poles
DPST (double pole single throw) and SPST (single pole single throw) are two different ways to wire this particular timer.
T103 timer can be wired numerous ways... but your project is not complicated.
DPST means timer turns off two terminals/poles (double pole) with each click/throw of timer switch (single throw)
SPST means timer turns off one terminal/pole (single pole) with each click/throw of timer switch (single throw)

2) T103 timer is ST single throw, all the lights come on at same time. So this timer is 1 channel.
1 channel timers are either ON or OFF and everything turns on-off at same time.
You cannot stagger on-off times with 1 channel timer.
If you want upstairs and downstairs lights to come ON at different times, you need two timers .. or a 2-channel timer (which is different ballgame).

3) T103 timer has 120Volt clock motor that is connected to terminals A and 1.
Look at timer and you can see small white wires connected to A and 1 terminals that power 125V clock motor.
When wiring this timer, your wires from 20 amp breaker box connect to terminals A and 1.
Black hot wire from breaker must connect to terminal 1
White neutral wire from neutral busbar must connect to terminal A
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T103
http://waterheatertimer.org/B220C.html

4) Terminal 1 must be hot so when timer switch clicks ON, it sends power to terminal 2.
Your load wires connect to terminals A and 2
I made simple drawing of SPST option showing how to wire T103 to 3 receptacles.
Fixya downgrades image so it's hard to see.
Hot wire to terminal 1
Load wire to terminal 2
Neutrals on terminal A
To see image larger:
http://waterheatertimer.org/images/110-600-21Kb.jpg

geno_3245_171.jpg
If you want to wire timer for DPST, which is necessary for loads exceeding 2 horsepower (1500 Watts) on each terminal
Notice black jumper wire from terminal 1 to terminal 3
Notice all white neutral wires to terminal A
To see image larger:
http://waterheatertimer.org/images/110-600-17Kb.jpg
geno_3245_172.jpg
I made third image for guy who was wiring high amperage blowers, that show wiring for two T103 timers. Having two timers would let upstairs and downstairs lights come on at different times.
http://waterheatertimer.org/images/110-with-2-timers.jpg

Dec 11, 2010 | Intermatic 24 Hour Mechanical Mechanisms...

1 Answer

I having troble with my t103 timer to turn the lights on manualy i try to set the timer but for some reason doesn't work what can i do ???


T103 Intermatic timer has 120Volt clock motor and can control 120V or 240V Loads.
Wiring for timer is shown on following link:
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T103

Troubleshoot T103:
1) Manual override is working correctly, and it snaps crisp and clean, and Load turns on-and-off.
That means timer is basically good.

2) Next look to see if yellow dial is rotating.
If dial is not rotating, then 120Volt clock motor needs to be replaced.
Take photo of wiring and mark wires before starting.
Remove two white wires connected to screw terminals 1 and A.
Snap timer mechanism out of box, clock motor is on back of timer.
Use small star screwdriver to remove old clock motor.
Reattach white wires on terminals 1 and A, tighten screws very tight.
Reset current time: lift and rotate dial until current time lines up with silver pointer.
Grainger sells 125V clock motor:
http://www.grainger.com/Grainger/INTERMATIC-Time-Clock-Motor-1PNK1?Pid=search

3) If dial is rotating, but gets stuck at certain times, or runs slow, then replace clock motor.

4) If dial is rotating, and trippers are attached to dial, but timer does not turn ON, then trippers are worn down and need to be replaced.
Grainger sells the T103 trippers
http://www.grainger.com/Grainger/INTERMATIC-Timer-Tripper-2E054?Pid=search

5) How Intermatic mechanical timers work:
Dial with ON-OFF trippers is rotated by clock motor.
Trippers on dial contact ON-OFF lever.
ON tripper pushes lever one direction.
OFF tripper pushes lever opposite direction.
Lever moves electrical contacts on back of timer that turn Load ON-OFF.
Manual override lever clicks back and forth with each ON-OFF action.

geno_3245_85.jpg

Nov 20, 2010 | Intermatic T103 Indoor 120-Volt 40-amp...

1 Answer

I have a intermatic timer model T103 i just put in. I use it to run outdoor lights. I can manually turn off and on lights but i cant get the clock to rotate or work. I have returned it and replaced it...


Sounds like you have Line and Load wires reversed.
Line wires come from breaker to timer.
Load wires leave timer and go to Load (light, fan, motor, pump)
Open following link to view wiring for T103
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T103

Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, expert speaks with you over phone while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

Nov 10, 2010 | Intermatic & Indoor/Outdoor Rain Tight...

1 Answer

Circuit breaker keeps tripping when timer turns on. Also, if turned on manually.Intermatic T103. I've had this timer for about a year and everything was fine until now.


Since the timer doesn't trip the breaker until it turns on the load, the circuit is OK up to and including the timer. Either the load is faulty (has a short) or the wire supplying the load is damaged. You can test the wire that supplies the load by disconnecting the load then turning the manual switch to ON. If the breaker doesn't trip, then you know it is the load itself that is causing the problem.

Mar 21, 2010 | Intermatic T103 Indoor 120-Volt 40-amp...

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