Have a Woods E211835/ MODEL TM008B Decora style Minute Preset Wall Switch Timer, . Worked fine for 4 months. Now no matter what time I press, it only stays on 10 -20 seconds.

Question posted under Woods countdown timer.
Open following links to identify timer and see how to wire this timer:
http://waterheatertimer.org/Programmable.html#wire
http://waterheatertimer.org/Woods-timers-and-manuals.html#59000

Additional resources:
http://waterheatertimer.org/Countdown-timer-horsepower-ratings.html
Woods series countdown timer is rated 1/4 Hp, and is suited for lights and bath vent fans, but not whole house fan.

There are no repairs for electronic wall timers.
Timers have 1 year warranty against defects in workmanship. This sounds like the case here.

Try timer on different circuit and see if same malfunction appears.

Woods is rated for 1/4 HP and will handle bath fan, so load does not sound like a problem.
Timer worked before, so wiring is correct.
Power outages can knock out timers when the power turns on again and timer is exposed to surge.

View countdown timers:
Electronic Leviton 6200 series and Leviton LTB series are more robust than Woods.
Mechanical rotary-type timers have no electronics, and last many years without problems.
Buy locally: GE countdown timers are sold at Home Depot. Advantage of store-bought timer is hassle-free warranty: buy new timer and return defect timer in new package.
http://waterheatertimer.org/Countdown-timer-horsepower-ratings.html

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You posted under Woods 59007 countdown timer.
Timer is wired incorrectly.
Open following link to identify timer for sure and download manual and read ez instructions.
http://waterheatertimer.org/Woods-timers-and-manuals.html#59000

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Open following link to identify timer for sure, download on-line manual, and read wiring instructions.
ttp://waterheatertimer.org/Woods-timers-and-manuals.html#59000

1) Manual says 1000Watt Tungsten (incandescent) and 1000Watt Ballast (fluorescent)
2) Timer is powered by electric circuit and not internal battery, so cold garage temps will not affect operation
3) Check wiring against instructions shown on link above, except your other timers work fine, which indicates correct wiring.
4) Buy cheap circuit analyzer at home center, and test receptacle on same garage circuit
5) Try moving known-good timer to same location and see if problem persists.
6) I test timers, and some in-wall and plug-in timers arrive defective, and some go bad quickly, most have 1 year limited warranty, some last 5-7 years.

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1) Leviton 6515 is incandescent only:
http://www.amazon.com/Leviton-6515M-I-2-5-10-15-Electronic-Incandescent/dp/B0007NOZDI

2) Below is list of countdown timers with horsepower rating so they work for fans:

GE15088 countdown timer is rated 3/4 hp
http://www.homedepot.com/webapp/wcs/stores/servlet/ProductDisplay

Intermatic spring wound countdown timers are rated for 2 horsepower
http://www.intermatic.com/products/timers/in-wall%20timers/decorator%20spring%20wound%20timers.aspx

Woods spring-wound countdown timer says bath/ ceiling fans, but doesn't give horsepower
http://waterheatertimer.org/pdf/Wood-59700-series--spring-wound.pdf
http://waterheatertimer.org/Woods-timers-and-manuals.html#countdown

Woods push-button countdown is 1/4 horsepower
http://www.amazon.com/Woods-59014-Decora-12-8-4-2-12-Hour/dp/B002C54GH4

Wattstopper RT50 at Grainger shows 1/6 horsepower rating
http://www.grainger.com/Grainger/WATT-STOPPER-Time-Switch-2HTE1?Pid=search

3) Following timers are NOT rated for fans:

Lutron MA-T51 countdown timer specifically says it cannot be used for motors.
http://www.amazon.com/Lutron-MA-T51-WH-Maestro-Countdown-Timer/dp/B001EFV1DA
http://www.lutron.com/TechnicalDocumentLibrary/0301041A.pdf

Pass and Seymour RT1 countdown does not show rating for horsepower, so this timer will probably not work for fan motor
http://www.homedepot.com/Electrical/h_d1/N-5yc1vZ1xg8Zarcd/

You wired timer incorrectly:
I think you put red and white wires together.
See timer and wiring instructions plus on-line manual at following link:
http://waterheatertimer.org/Woods-timers-and-manuals.html#59000

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Spring wound countdown timers turn on the load after dial is turned.
If your timer is not counting down, and turn knob is not rotating back to the start position, then timer is no good.
This timer counts down even if it's not connected to electricity, so the problem is not wiring.

The following diagram is for timers with green, black, white, and red wires:
If your timer is different, add a comment with model number.




Manual says:
Timer-black-wire to Hot; Timer-red-wire to Load (lights)
Timer-white-wire to Neutral.
Here's what to do
1) Timer-green-wire connects to bare ground wire.
2) Switch has 2 wires. Take switch wires and connect them to timer-black-wire and timer-red-wire. Choose either one for now.
3) In back of electric box are white wires twisted together and covered with wire nut. Connect timer-white to these wires.
4) If electric box does not have white wires described above, then connect timer-white to bare ground.
5) Turn on electricity, and push manual override button. If lights come on, timer is wired correctly. If lights do not come on, then reverse timer-red and timer-black wires.

Woods 59301
Manual for 59301
http://waterheatertimer.org/pdf/Woods-59203.pdf

Plug timer in wall for 1-2 hours so rechargeable battery charges
If display does not show after 1-2 hours, the battery is dead and timer is no good

After 1-2 hours, you can remove timer from wall to program

Press reset (R) with paper clip to clear memory

Select format: Press and hold Clock button until 12 hour or 24 hour shows on display, then release
Press hour button to change display to 12H
press Clock button and display returns to normal
AM shows in upper left corner

Set current time:
Press and HOLD clock button
While holding clock button, press hour button and minute button until display shows current time
Release clock button
Press and HOLD days button until current day shows in display
Release days button

Further instructions to set ON-OFF times are in manual (click link shown above for manual)
If you have problems, re-post additional question.

Copy following link:
http://waterheatertimer.org/How-to-wire-timers.html
Gene
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