Intermatic 156T1978A Replaceme...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$57.61
$6.27
Intermatic 156T1978A Replacement Timer Tripper Set, 1 ON and 1 OFF, T-Series

Intermatic 156T1978A Replacement Timer Tripper Set, 1 ON and 1 OFF, T-Series

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Model: 156T1978A
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$57.61
$6.27
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Intermatic 156T1978A Timer Tripper Set — 1 ON & 1 OFF Replacement for T100, T7000 & WH40 Series

The Intermatic 156T1978A is a replacement tripper set for T-Series mechanical timers, supplying one ON tripper and one OFF tripper in a single package. It restores precise on/off scheduling to T100 Series, T7000 Series, and WH40 timer dials without requiring a full timer replacement. Compact and lightweight, it fits directly onto the existing timer dial with no tools required.

Compatibility

  • Intermatic T100 Series mechanical timers
  • Intermatic T7000 Series timers
  • Intermatic WH40 water heater timers

What's Included

  • 1 × ON tripper
  • 1 × OFF tripper

Features

  • Restores full on/off timing control to worn or missing tripper positions
  • Multicolor coding distinguishes ON from OFF trippers at a glance
  • Lightweight at 0.046 lbs — no added load on the timer dial mechanism
  • 1-Year limited warranty

Technical Specifications

  • MPN: 156T1978A
  • Height: 5 in
  • Width: 0.5 in
  • Depth: 4 in
  • Weight: 0.046 lbs
  • Color: Multicolor
  • Country of Origin: Mexico
  • Warranty: 1-Year limited

Manufacturer Resources

Product Specs

Application:
Indoor Lighting Control;Timing/Scheduling ON/OFF
Country Of Origin:
Mexico
Marketing Description:
Replacement tripper package for T100 Series, T7000 Series, and WH40 timer products. Includes 1 ON tripper and 1 OFF tripper for precise automated scheduling control.
Product Color:
Multicolor
Product Height:
5 in
Product Length:
NA NA
Product Weight:
0.046 lbs
Product Width:
0.5 in
Warranty Period:
1-Year limited
Product Depth:
4 in

Intermatic 156T1978A – Frequently Asked Questions

1) Will Intermatic 156T1978A trippers fit a T104 or other T100 Series timer dial?
The 156T1978A tripper set is made for Intermatic T100 Series mechanical timers, T7000 Series timers, and WH40 water heater timers. It snaps onto the existing dial by hand, so if your timer is in one of those three families you can replace worn or missing trippers without pulling the timer out of the box.
2) How many trippers come in the Intermatic 156T1978A set?
Two: one ON tripper and one OFF tripper. That is a single on/off cycle per day on a 24-hour dial. If you need a second daily cycle, or you are restoring a dial that lost several trippers, order more than one set, because one package only covers one ON/OFF pair.
3) Do I have to replace my whole Intermatic timer if the trippers are broken or missing?
No. Trippers are the replaceable part on a T-Series mechanical timer, and the 156T1978A set restores on/off scheduling to a T100, T7000, or WH40 dial without swapping the timer. If the clock motor still turns and the switch still throws, replacing the trippers is the repair.
4) Do I need tools to install Intermatic 156T1978A trippers?
None. The trippers clip directly onto the existing timer dial by hand. Set each one at the hour mark you want, tighten it down against the dial, and the schedule is live on the next revolution.
5) What is the Intermatic tripper set part number for a WH40 water heater timer?
156T1978A is the Intermatic MPN. It covers WH40 water heater timers along with the T100 and T7000 Series, and it is the number to quote when you are ordering trippers for a water heater time clock.
6) How do you tell the ON tripper from the OFF tripper on the Intermatic 156T1978A?
By color. The set ships multicolor coded so the ON and OFF trippers read apart at a glance on the dial, which matters when a maintenance tech is setting a schedule inside a panel with a flashlight rather than counting parts on a bench.
7) Can Intermatic 156T1978A trippers be used for outdoor lighting or only indoor?
The application Intermatic lists for this tripper set is indoor lighting control and general ON/OFF scheduling. The tripper itself sits inside the timer enclosure, so what governs an outdoor job is the rating of the timer and cabinet it goes into, not the tripper.
8) Will adding trippers put extra load on my Intermatic timer dial?
The whole 156T1978A set weighs 0.046 lbs, so a pair of trippers adds essentially nothing to the dial mechanism. Stacking multiple sets on one dial for several daily cycles is normal practice on T-Series timers.
How fast can I get the Intermatic 156T1978A delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Intermatic 156T1978A come with a warranty?
Absolutely. The Intermatic 156T1978A is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Intermatic 156T1978A?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Intermatic 156T1978A from ZenSupply?
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