Intermatic Timer Mechanism Only 120V - T101M



Part # T101M

By Intermatic

  4 Average  



Part # T101M

Alternate Part #'s INTT101M

Product Description

These heavy duty Time Switch Mechanisms are designed for industrial, commercial and residential applications, and have the highest motor load ratings in the industry. They provide up to 12 ON-OFF operations each day with minimum ON-OFF time of 1 hour. All models are equipped with "ON" and "OFF" trippers and can be installed in almost all Intermatic enclosures. T101M Timer Mechanisms are 120 Volts and have a switch rating that is 40 AMP resistive.



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  • 156T4042A Fireman's Switch
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  • WG1573-10D
  • 156T6738A Insulator - Slave (10) per pack
  • 156T1978A Two Intermatic Trippers 1 Off & 1 On

Click here for more Intermatic Timers


?     Asked on 7/19/2019by JOHN

DOES THIS T104M EVER STOP AND START AT WILL. Just had 2 A>O>Smiths 2 hp. put in in last 2 wks and it's doing to same as before. Motor starts on time 3 or so hrs later it stops, then maybe a half hr later it starts again, On and Off everyday. Can it be the clock mechanism

A  Answered on 7/19/2019 by InyoPools Product Specialist Lennox H.

Hi, John. This timer based on the tripper setting will turn the load side on the timer off/on based on the set times. 

?     Asked on 7/14/2019by Arthur Cafiero

i need a double pole timer - is this one?

A  Answered on 7/16/2019 by InyoPools Product Specialist Hector F.

The part number for an Intermatic timer mechanism that is powered by a double pole breaker is part number T104M and a complete model with enclosure is model T104P3

?     Asked on 6/4/2019by Tonia

Based on the enclosed picture is this the correct timer mechanism that I need to order? Thanks.


A  Answered on 6/5/2019 by InyoPools Product Specialist Patrick P.

Hi Tonia, We are showing that the T10004R Control Panel uses a T104M 240V Timer Mechanism and not this T101M 120V Timer Mechanism.

?     Asked on 1/15/2019by Fred Dargahi

I noticed Terminal 1 and wires connected to it have turned black with 2 to 3 inches of the covers on the wires have been melted. Pump and clock are working. I turned off the timer. I don't know what caused the melting of covers on the wires. What do you suggest\?s Thanks, Fred


A  Answered on 1/16/2019 by InyoPools Product Specialist Lennox H.

Hi, Fred. I suggest replacing the timer mechanism along with the wires to and from the breaker making sure that you're using the proper wire size. 

?     Asked on 5/2/2017by John

i have a T1000R pool timer with I believe a T104M, the timer seems to work fine but it wont turn the switch on to run the pump however I can turn it on manually??? May be 230v

A  Answered on 5/3/2017 by InyoPools Product Specialist Scott W.

That replacement timer mechanism is part number T104M if it is 220V.

?     Asked on 4/14/2017by John

I have Model T20001R2 that needs to be replaced. Which model do you recommend. Thank you.

A  Answered on 4/14/2017 by InyoPools Product Specialist Lennox H.

Hi, John. The Intermatic T20001R2 uses this T101M mechanism.

?     Asked on 3/20/2017by John

I have a Model T12404R dual timer switch. One of the sides has quit working. What is the proper product to replace this one side?

A  Answered on 3/20/2017 by InyoPools Product Specialist Andy O.

Hello John- The correct Mechanism for your Intermatic T12404R Control Center w/220v Dual Timer w/o Breakers is the Intermatic Timer Mechanism Only 220V - T104M.

?     Asked on 2/28/2017by Rick

I have a T1202 M1. Would this be the appropriate replacement?

A  Answered on 3/1/2017 by InyoPools Product Specialist Stacey M.

Hello Rick - The T101M (120V) would fit the PF1202T box but it is not the correct mechanism. The correct mechanism is the T104M (220V). I don't see any replacement for t1202 M1, you might try reaching out to Intermatic 815-675-2321 to see if there is something other than t1202.

?     Asked on 5/6/2016by Inyo Visitor

I've got lights on my walkway and the timer isn;t working. I will set the time and it doesn;t keep accurate timing. Also, if I put the switch to manual it switches the lights on, but, the timer has no affect on the lights turning off or on. I'm assuming that the motor needs to be replaced. The model is T101R, what timer model should I order? Thanks

A  Answered on 5/7/2016 by InyoPools Product Specialist Lennox H.

Hi, This T101M Mechanism will be the correct part if you want to replace the entire unit or WG1570-10D will be the replacement motor.

?     Asked on 4/30/2016by Bobby Cherry

Hey Steve, I have m/n T12404R dual timer controller. One of the timer motors has stopped working. I've seen your step by step guide for replacement but, can't seem to locate a correct p/n for just the timer motor. Can you help?

A  Answered on 5/3/2016 by InyoPools Product Specialist Lennox H.

Hi Bobby, The WG1573-10D will be the correct replacement motor for the T104M timer used in the T12404R unit.

?     Asked on 3/5/2016by Steve Boehm

I have an old intermatic timer that has quit working. It shows the model number as 89 13N66. What is the current replacement?

A  Answered on 3/11/2016 by InyoPools Product Specialist Lennox H.

Hi Steve, The Intermatic Timer Mechanism Only 120V will be the correct replacement or the this can also be a replacement depending on the enclosure you have.

?     Asked on 2/12/2016by Gardner

My Intermatic Pool Pump Timer - circa 1998 - has ceased to function. On the back of the timer it lists Model AND WG 1573-5..The outside box is fine I just need a new timer..What is now the correct current model? Thanks!

A  Answered on 2/16/2016 by InyoPools Product Specialist Charlie R.

Gardner,The Intermatic time clock part # WG1573-5 can be seen by clicking this link. We do have it in stock for immediate shipping.

?     Asked on 5/29/2015by Inyo Visitor

How do I install an intermatic timer model T101M?

A  Answered on 5/29/2015 by InyoPools Product Specialist Patrick P.

We have a guide here on How To Install an Intermatic Timer Mechanism which will help you with the installation.

?     Asked on 5/21/2015by Inyo Visitor

I have a pool timer Model # T101P which I need to replace. The enclosure is fine can I replace the clock only? The Model is T101 MD89 would this be a match?

A  Answered on 5/21/2015 by InyoPools Product Specialist Patrick P.

Yes if your enclosure is fine then this would be be the correct timer mechanism replacement for the T101P. This would be the complete insides of the T101P minus the outer enclosure / casing.

?     Asked on 4/29/2015by Ronny

Will these fit the Model PF1202T Timer?

A  Answered on 4/29/2015 by InyoPools Product Specialist Robert M.

Hello Ronny - The T101M (120V) would fit the PF1202T box but it is not the correct mechanism. The correct mechanism is the T104M (220V).

?     Asked on 2/10/2015by Inyo Visitor

I need to replace an old T103M timer. Which replacement do I need?

A  Answered on 2/10/2015 by InyoPools Product Specialist Alex V.

Hello, I would recommend staying with the T103M mechanism.

?     Asked on 1/10/2012by Guest

Is the T101M the correct mechanism for the T101P3?

A  Answered on 1/10/2012 by InyoPools Product Specialist Patrick P.

Yes, the T101M is the correct mechanism for the T101P3 and T101R3.

?     Asked on 3/9/2008by Guest

How do I know wheather I need the T101M or the T104M?

A  Answered on 3/9/2008 by InyoPools Product Specialist Patrick P.

T101 or T104 should be on the inside door of your current timer or somewhere on the timer. If you cannot find this information you can unclip the timer clock mechanism and on the back of the timer there will be a motor. If there is a part # of WG1570 or 120V marked on the back of the timer motor then you would require a T101M 120V timer mechanism. If there is a part # of WG1573 or 240V marked on the back of the timer motor then you would require the T104M 240V timer mechanism. You may view or purchase these timers through this link 


Est. Repair Time

Less than 1 hr

Tools Needed


0     1

I ordered the wrong timer.

Written on 11/24/2017 by Guest

It had 5 wires to hook up to my 3 wire set up. I am ordering a new one.

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