Question about Intermatic T104 24h 208-277v Mechanical Time Switch

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How to install a new intermatic switch - Intermatic T104 24h 208-277v Mechanical Time Switch

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Intermatic e1010

Is this new timer installation, or older timer that stopped functioning?

1) Copy following link to help identify timer, download manual:

2) If this is new installation, then check wiring for single pole installation. This timer will not work for 3-way switching.

3) If timer worked before, and now clock motor has stopped working:
Turn power off, use compressed air to blow out timer, then see if you can spray highly flammable vapor from WD40 can into the motor.gears.

4) There are replacement trippers for this timer, but no replacement clock motors.
Buy another single-pole in-wall timer.

Dec 03, 2012 | Intermatic Hardware & Accessories

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Timer will not turn off

Question posted under Intermatic T10004R pool control center.

If installation worked before:
Might be worn 156T1978A tripper.

If this is new installation:
Might be wired incorrectly. Wires from breaker confused with wires from Load.

Sep 29, 2012 | Intermatic T10004R - Pool-Spa Mechanical...

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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...

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Manual switch works timer doesn't.

Timer that worked before and stopped working: could be clock motor or trippers
New timer installation: possibly the wiring from breaker box and wire to Load are reversed.

Open following links to troubleshoot Intermatic timer.

Jul 27, 2011 | Intermatic & Indoor/Outdoor Rain Tight...

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I am installing an intermatic t104m with firemans switch.I hooked up the switch to the pool heater and no power to heater?

Add a comment and provide more information.
A lot of factors need to be narrowed down.

Did everything work fine before connecting fireman burn-out protection switch?
What happens when you disconnect switch?
Is the timer rotating?
Does the manual override work?
Is this a new installation?
This sounds like a dual T-104 pool timer that controls more than the heater, what else is controlled, and do the other Loads work correctly?

Nov 19, 2010 | Intermatic HEATER DELAY SHUT OFF SWITCH...

1 Answer

I installed a new timer today, it works ok but ...

It would be very handy to know the timer model number that appears inside door of timer.
Open following links to help get started on the troubleshoot:

May 20, 2010 | Intermatic R8806P101C -...

1 Answer

New unit, just purchased, after installing new batteries, it will not work (no display). Model ej500c

Try this:

May 06, 2010 | Intermatic EJ500C - Indoor Digital Wall...

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