Haw to sat intermatic ff12h timer spring wound

SOURCE: For an intermatic EJ341 spring wound timer, there

Switch has 2 wire > one of these wires is Hot and it connects to Timer black wire > the other wire goes to Load and connects to Timer red wire.

If you get these two wires reversed, timer will not run, so switch them. You know timer is running when dial on front of timer rotates with passing time. You can test for Hot wire by taking out switch, separate wires, turn on power, test each wire to bare ground, tester lights up with Hot wire.

Timer white wire goes Neutral. This wire is necessary to run clock inside timer. Locate Neutral wire inside box >> it is usually two or more white wires twisted together and pushed to back of box. If you do not have a Neutral wire, connect Timer white wire to bare ground wire ... until you can hire electrician to run additional wire to box.

SOURCE: The spring that turns off

Parts are not available for WH21 240V water heater timer.
Timer has 1 year limited warranty.
http://www.intermatic.com/customer%20service/frequently%20asked%20questions.aspx
WH21 is rated for 25Amps and works on water heaters up to 4500Watts.
Look at label on side of tank to see wattage.
WH21 is SPST and turns off one hot wire to water heater.

I ran a business for many years.
Cost of stocking, organizing, and shipping parts is near same cost as new timer.

Following page shows selection of replacement timers:
http://waterheatertimer.org/Boxtype.html

For example, I have tested WH40 and T104 and other timers that show on page.
Trippers and motors are available for Intermatic box timers WH40 and T104, so you can maintain these specific models for many years.
http://www.grainger.com/Grainger/timer-accessories/timers/electrical/ecatalog/N-8hi
WH40 and T104 timers are SPDT and turn off both hot wires to water heater.
Both timers will work on any wattage residential water heater

http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html
http://waterheatertimer.org/How-to-wire-EH40-hot-water-heater-timer.html

SOURCE: broken press on knob for

Intermatic makes replacement plastic knobs, but I have not run across a metal knob.
http://waterheatertimer.org/Intermatic-trippers-and-parts.html#FD-knob

Since the plastic knob sells for $3-4, and probably is not a high volume seller, there would not be much incentive for industry to make a knock-off imitation of Intermatic knob out of more costly material like metal, let alone have a viable market outlet for that product.

Absolutely feel obligated to upvote the help.
Or take advantage of fixya expert assistance live.
For a price, expert works with you while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

SOURCE: Intermatic press on plastic knob

Intermatic makes replacement plastic knobs, but I have not run across a metal knob.
http://waterheatertimer.org/Intermatic-trippers-and-parts.html#FD-knob

Since the plastic knob sells for $3-4, and probably is not a high volume seller, there would not be much incentive for industry to make a knock-off imitation of Intermatic knob out of more costly material like metal, let alone have a viable market outlet for that product.

Absolutely feel obligated to upvote the help.
Or take advantage of fixya expert assistance live.
For a price, expert works with you while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

SOURCE: how to remove a Intermatic 30 Minute Spring Wound Timer FF30MC

10-22-12
FF30 Intermatic timer: The turning knob pulls off.
(With some really old models, 1960s, there is a small set screw on the fat end of knob.)
Under the knob is a small hex nut that twists off to remove plate.
http://waterheatertimer.org/Countdown-timer-horsepower-ratings.html

http://waterheatertimer.org/How-to-wire-switches.html#gang

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