How to troubleshoot Intermatic timer and replace Intermatic clock motor

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2011

How to Troubleshoot Intermatic timer and replace Intermatic clock motor

Troubleshoot
Dial rotating on time	Manual override turns Load ON-OFF	Load turns ON-OFF	Action
Permanently override timer by removing trippers from dial.
1) Yes If dial is rotating, then electricity to timer is good.	Yes, load turns on-off with override	Yes, load turns on-off	No action, timer working
2) Yes, dial rotates on time	Yes, load turns on-off with override	Yes, load turns on-off but with override only	Replace trippers, check that copper wire is attached tight to brass terminals
3) Yes, dial rotating but not keeping time	Yes, load turns on-off with override	Yes, load turns on-off but not on time	Replace clock motor, check for loose wires, check for bad breaker, reset clock after power outage
4) Yes, dial rotates on time	Yes, load turns on-off with override	Turns ON but not OFF -or- turns OFF but not ON	Replace trippers Intermatic trippers and parts
5) Yes, dial rotates on time	NO, load does not turn on-or-off, but override snaps crisp-n-clean	NO, load does not turn on-or-off	Check breaker and power to Load; check Load is working, test for voltage going to load, check for loose wires
6) Yes, dial rotates, but stops after tripper passes	Yes, load turns on-off with override	Yes, until dial stops	Check Wiring. Line and Load wires are reversed. Line wires come from breaker. Load wires go to electrical device.
7) NO, dial not rotating	Yes, load turns on-off with override	Yes with override only	Replace clock motor
8) NO, dial not rotating	NO, load does not turn on-or-off, but override snaps crisp-n-clean	NO, load does not turn on-off	Check wiring, check breaker and power to timer, check that copper wire is attached tight to brass terminals How to replace circuit breaker
9) NO, dial not rotating	NO, load does not turn on-or-off, and override lever is sluggish, or stuck and will not move	NO, load does not turn on-off	Turn off power, spray WD-40 on lever and gears, replace clock motor, buy new timer
10) Timer wires are burned and melted Scroll down on this page		Chart as pdf
Larger image	Larger image Pool timers and manuals	How to operate and set T104 timer How to wire Intermatic T100 series timers How to wire Intermatic T1905 and T1906 How to wire Intermatic WH40 and EH40 and EH10 How to wire several brands of box timers

After power outage, lift and rotate dial clockwise until current time lines up with with siilver pointer

How to override dial-type mechanical timer:
Remove trippers from dial and push manual override lever to ON position.
Use this technique if your water heater will not function and you want to test water heater circuit, or if you want water heater turned ON full time while guests are in town.

Troubleshoot electric water heater
Troubleshoot power from circuit breaker to water heater
Replace circuit breaker
See basic water heater circuit
Box-type water heater timers

Intermatic timer making noise? Spray gears with WD40. Or blow out timer with air. See image of gears
Turn off power: WD40 vapor is highly flammable accelerant. Do not spray WD40 on live electric connections or hot surface.
Open timer door. Spray metal gears located under the yellow dial.
Then use thumb spring located top inside box to release mechanism.
Tip out mechanism. Clock motor gears are located on back of mechanism.
If removing wires, read information below to prevent fire hazard.

Timer mechanism

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How to replace Intermatic clock motor
TURN OFF POWER
Release mechanism from box using thumbspring located inside top of box.

Replacement boxes and other Intermatic parts

Identify Clock motor: model number
Numbers appear on back of motor
WG1573 240 volt consumes 3 watts of power

Identify clock by timer model number:
Clocks Motors and accessories/ pdf
Clock motors3 pdf

Buy clock motors
at Aplus
at ESO
at TheFind
at Grainger
at Shopping.com
at ShopWiki
at Grainger

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Clock motor is held in place with 2 star-screws.
Image on left shows typical WH40 and T100 series timers

Remove 2 screws
Buy star screwdriver from auto parts store or hardware store.

Clock wires connect to terminals on front of timer
Make sure clock wires do not interfere with moving parts
Tighten all screws very tight
Read next section below to safely reconnect wires to timer.

Recycle, so products don't end up in your food.

WH40 water heater timer

Avoid fire inside Intermatic timer

1) Treat timer as a circuit breaker box, and keep enclosure door closed, and keep terminals screws covered with plastic insulator.
All elecrtrical boxes are covered to contain overheating and potential source of fire.
If wires overheat, then closed door contains fire by starving fire of oxygen.
Without oxygen, the fire cannot spread.
Door also keeps melted material from falling out of enclosure and onto nearby flammables.

2) Use romex connectors where wire enters enclosure.
Tighten romex connector against wires so wires cannot pull loose.

3) Know amp rating of timer by reading information on inside of timer door.
Match wire size to amp rating of wire. Match amp rating to nameplate rating of water heater or pump that is controlled by timer.

Know your wire sizes and amp ratings. Wires and cables are color-coded.
See wire size amp chart
Figure volts amps watts for water heater or any appliance

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Fire inside Intermatic timer? Attach wires correctly Check amp rating of timer by reading information inside timer door, WH40 and T100 series is 40 amps, other Intermatic timers can be more or less. Check amp rating of Load and Breaker, check wire size, check that wires are installed corectly on timer.

Only copper wire and no insulation should be under the screw-down plate. Tighten screws very tight. Use copper wire only.
Do not use both solid and stranded wire on same terminals. Stranded wire will come loose
Do not mix two different gauge, or diameter, wires under same plate. Smaller wire will come loose
Contact Intermatic
Take photo of wiring before replacing timer so replacement is easier

Snap into old box

Buy mechanism and snap into existing enclosure
T100 series mechanism is sold separately.
T104 timer = order T104M
T103 timer = order T103M etc.

Necessary only if gears are rusted and manual override lever does not snap crisp and clean.
New trippers and clock motor are cheaper than buying mechanism.

Fire-damaged timer can be replace with mechanism, without changing enclosure.

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Trippers Yellow dial rotates as time passes, and the Off and ON trippers push lever that causes timer to operate. Clock motor operates dial and will keep correct time for years. Image shows typical WH40 and T100 series Tripper identification numbers	156T1978A

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Intermatic T8845PV

T8845PV larger image

Sprinkler timers
When planning watering times it is important to understand how the timer works. The timer just turns on-and-off, and each time the timer turns off, the sprinkler valve automatically advances to next zone. So the sprinkler valve is doing the mechanical job of advancing through each zone.

Rain sensor is not supplied with timer. Buy separate rain sensor. The rain sensor plugs into standard outlet. Connect the wires from rain sensor to terminals on timer. Do not apply voltage to rain sensor terminals.

T8845PV has 24Volt transformer with two yellow wires. Connect yellow wires to sprinkler solinoid. Connect 120Volt power to terminals marked Line and Neutral. Line is the black hot wire. Neutral is the white wire. Do not connect power to yellow wires.

Parts list and troubleshoot for sprinkler timers

How to set and troubleshoot sprinkler timers/ pdf

156T1950A

All brands of timers including Intermatic sprinkler:
With 120Volts, Line is the black hot wire. And Neutral is the white wire. Connect the black and white wires to terminals marked Line and Neutral.
With 240Volts, both wires from breaker are hot Line wires. L1 and L2. Either hot wire can connect to either terminal without regard to wire color.

Intermatic trippers and parts

How to set timers/ generic information for analog dial-type timers

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All in-wall Intermatic timers

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