I have a leviton programable timer no.vpt24 Your instructions show two wires in the junction box. I only have one wire.I can join the black to black white to white but no wire to join with red wire

Thank you for clear description of wiring, switches, and for including timer model number.

1) Open following link for ez programming and wiring for Utilitec.
http://waterheatertimer.org/Program-wire-Utilitec-0192773.html

2) Your single-pole switch has 2 wires.
0192773 replaces single-pole switch only.
Black wire that connects each of the switches is Hot wire: connect this wire to timer Black wire.
Other black wire that connects to switch goes to load: connect this wire to timer red wire.
Timer white wire connects to white wires that are covered with wire nut.
Timer green connects to bare ground wire.

3) How to connect stranded wire and solid wire
http://waterheatertimer.org/How-to-twist-electric-wire.html#stranded

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Utilitec 0192773 replaces single-pole switch and will not work for 3-way applications.

Open following link for clear wiring and programming steps for Utilitec 0192773
http://waterheatertimer.org/Program-wire-Utilitec-0192773.html

Utilitec can also be tricky to program if you are setting up astro dawn-dusk function.

For others finding this thread, same wiring applies to in-wall programmable timers by GE, Woods, Swilight, Sylvania, Tork, Hagar, UPM, Leviton, Grasslin, Wattstopper, Westek, and Intermatic analog timers. Intermatic battery-operated, Brinks and Aube timers are wired differently since they also work for 3-way applications.

Open following link to identify timer:
http://waterheatertimer.org/Countdown-timer-horsepower-ratings.html#6230

Leviton 6200 series timer replaces single-pole switch. Will not work for 3-way or 4-way applications.
Timer has 4 wires: Blue, Black, White, Green
Timer Green to bare copper wire.
Timer Black to Hot wire from breaker.
Timer White to Neutral wire from breaker. Neutral wires are white wires that are twisted together and covered with wire nut pushed to back of box. If box does not have neutrals, connect Timer white to bare ground wire.
Timer Blue to Load wire.
If timer does not work, reverse Timer Black and Timer Blue.

Leviton countdown timers have additional wire that powers internal electronics.
Leviton timers have red-black-white-green wires (or blue-black-white-green wires)

1) Regular single pole switch has 2 insulated wires. One of these wires is Hot from breaker, and the other goes to Load (fan)
2) Timer green wire connects to bare ground as you know.
3) Hot from breaker connects to timer black wire.
4) Load wire connects to timer red (or blue) wire.

5) Located in back of box are white wires that are twisted together and covered with wire nut.
These are Neutral wires. Connect timer white to these wires. This will power timer electronics.
6) If box does not have Neutral wires described above, then connect timer white to bare ground along with timer green wire.

7) Turn power ON and try timer countdown.
If timer does not work, then reverse timer red and timer black wire.

8) If box does not have neutral wires: Image on link below shows similar Intermatic timer:
Image applies ONLY when Neutral is not available.
http://waterheatertimer.org/images/EI210-wiring-full.jpg

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Electrician test wiring before connecting anything.
First of all, you don't mention what type of switch was replaced.

1) Leviton 6230 countdown timer is made to replace single-pole light switch only.
Single pole is where 1 switch controls the Load (light fan motor)

Your wiring sounds like 3-way switch.
3-way is where 2 switches control same Load.
For example a hallway usually has 3-way switches.

To confirm. If old switch has 1 dark screw, 2 brass screws, and 1 green screw, then that is 3-way switch. Use Leviton LTB15, LTB30, LTB60, LTB02, LTB12 countdown timer for 3-way.
Smarthome sells product and shows .pdf manual
http://www.smarthome.com/4255/Leviton-LTB60-1LZ-4-Button-10-20-30-60-Minute-Countdown-Timer-Switch/p.aspx


2) If old switch has 2 brass screws and 1 green screw then that is single-pole switch.

3) If you are replacing single-pole switch, here are testing & wiring instructions for Leviton timer.
Remove device and separate wires for testing.
Use ordinary two wire tester.
Tape tester leads to wood sticks so hands are away from power.
Do not untwist wires that were twisted together before you started.
Turn on power.
Test each wire to bare ground wire.
Tester lights up on Hot wire. This wire will connect to timer black wire.
Now you know Hot wire.
Test Hot wire to each of the other wires, excluding bare ground wire.
Tester lights up on neutral. Timer white wire connects to Neutral wire.
If box does not contain Neutral wire, then timer white wire connects to bare ground.

Timer green wire connects to bare ground wire.
Timer red wire connects to wire going to Load.

First thing to consider is size of Load.
Leviton countdown-timer Load rating is 1800 Watt, 120Volt.
Look inside Jacuzzi at rating plate on motor.
Rating plate on motor should give Volts, Watts and Amps.
Formula Volts x Amps = Watts.
Sometimes motor shows VA which is Watts
Is Jacuzzi on 240Volt breaker or 120V breaker?
Leviton countdown timer is not for 240V load.

A) If 120Volt electric Load checks out, here's how to wire timer if 1 cable enter box.
Timer-black-wire connects to jacuzzi-black
Timer-white-wire connects to ground.
Timer-green connects to ground.
Timer-red connects to jacuzzi-blue.

B) Here's how to wire timer if 2 cables enter box.
120Volt cable coming from breaker box has black, white and bare copper wire.
Timer-black-wire connects to black-wire-from-breaker
Timer-white-wire connects to white-wire-from-breaker-box.
Timer-green and jacuzzi-ground connect to ground

Timer-red-wire connects to jacuzzi-black-wire.

Jacuzzi-blue-wire connects to white.
I am puzzled why this wire is blue if circuit is 120Volt.

If your box contains 2 and only 2 wires, then the Utilitec timer will not work.
You need the Intermatic ST01C or EJ500 timers that operate with a battery.

I have tested the Intermatic and Utilitec timers:
http://waterheatertimer.org/Program-wire-Utilitec-0141224.html
http://waterheatertimer.org/ST01C-program.html#wire
Do not connect white and red wires together on any timer, but thank you for solving the problem why lights blink when connecting timers.

Now lets look at your wires.
Scrape paint off the wires so you can identify white and black.
According to your information, the black wire inside box will connect to timer-black wire.
The red wire always goes to Load (your light, fan, motor)
The white wire is necessary to complete a circuit so the clock inside timer will operate.
The timer has a clock just like your alarm clock, and it needs to connect back to neutral busbar in breaker box.
This is why the battery-operated timers will work with two wires, the clock runs on battery.
The Utilitec timer-white wire is the wire that goes to Neutral
The timer-white wire is supposed to connect to the other white wires that are twisted together and covered with a wire nut ... but some boxes do not have this neutral wire
To work-around, the timer-white wire can also connect to a bare ground wire.
The bare ground wire also connects to Neutral busbar in breaker box

If you do not have a neutral or ground wire as described above, then you need the battery-powered ST01C or EJ500 Intermatic timers.
See if you can pull some more of the wire into your box ... there might be a ground wire that was cut off and pulling more wire might reveal a ground wire. This will salvage the project.
Aplus is one of many places that sell the Intermatic timer
http://www.aplussupply.com/intermatic/timer.htm

For more about electric wiring:
http://waterheatertimer.org/See-inside-main-breaker-box.html
http://waterheatertimer.org/B220C.html

Hello, I bought an in door smart digital timer (G.E.) or Jasco product for my front porch light. I hooked all the wires as instructed and programmed according to instructions. I have a two wire system, so i left the green wire unattached. The light comes on but flashes very fast. What's up with that? This is the second one i've replaced, the first one did the same thing!. Whats wrong?
Thanks,...
M Jones
Sacramento, CA.

Switch has 2 black wires. One black is hot wire. One black is wire going to fan. Turn off power. Remove wires from switch and separate. Turn power back on. Using ordinary tester, test each black wire to bare copper ground wire. Only one of the black wires will test hot. The other black wire goes to fan.
Timer black wire connects to black hot
Timer blue wire connects to black wire going to fan
Timer white wire connects to white neutral (in absence of white neutral, connect Timer white wire to bare ground)
Timer green connects to bare ground wire

You need to have a pair of white wires wirenuted and shoved in the back of the box. White to white, black to the hot and blue to the load on the second black. Some of these have a yellow wire for three way connections.