T12404 control center for 2 speed pump
Uses T104 and T106 timers located side-by-side inside control center
No circuit breaker spaces

Buy
T104 mechanism
T106 mechanism
T10604R with T106 and T104  /208-240V for 2-speed pumps
Pentair pool
Hayward pool
Intermatic parts sheets
Resources:
Control centers and parts
Digital control centers and parts
Freeze control centers and parts
T12404R wiringT12404R wiring for 2 speed pump
For controlling 2-speed pool pump with minimum cost and long-term reliability. Replacement parts are available and installed DIY with screwdriver.
Supply voltage is 240 volts connecting to Terminals 1 and 2 on T104 timer, located on right side.
Both timers have a clock motor that rotates the yellow dial once per day. The dial can hold up to 12 sets of trippers. Typically, the swimming pool timer has 2 sets of trippers for 2 OFF and 2 ON each day. Both clock motors are connected to terminals 1 and 2 on the T104 timer.

The way it works: T104 timer controls the on-off function for the pump. When T104 turns on, power is sent to T106 timer. T106 timer has NO and NC terminals. One set of terminals or the other set of terminals is ON at all times. When power arrives from T104, the power is sent to either low or high speed on the pool pump. Trippers on the dial of the T106 timer control when the pump is high speed or low speed.

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Wiring for 2 speed pump
Uses T104 and T106 timers located side-by-side inside control center

Buy
T104 mechanism
T106 mechanism
T10604R with T106 and T104  /208-240V for 2-speed pumps
Pentair pool
Hayward pool

More wiring diagrams on following links:
How to wire T104
How to wire T106
How to wire Hayward 2 speed pool pump
How to wire freeze control
How to wire T10404R and T10101R
Troubleshoot T10404 and T10101R
-Flip circuit breaker fully off and then back on.
-Check that both clock motors are connected to terminals 1 and 2 on the Filter timer.
-Observe if both clock dials are rotating 1 revolution per day. If dials are not rotating, then clock motor is bad, unit is not getting voltage, or is getting incorrect voltage.
-Convert timer to either 120 Volt or 240 volt by changing clock motor
Buy:
240 volt clock motor for T10404R
120 volt clock motor for T10101R

-Check if each clock dial has ON and OFF trippers fastened to yellow dial.
-Move both override levers to ON position. If Filter pump is OFF and Cleaner pump is OFF, then move both override levers to ON position. If Filter pump works and Cleaner pump works, then voltage is correct and wiring is correct.
-If all the above steps function correctly, observe if the trippers push the override lever back and forth between ON position and OFF position. If the dial rotates tripper past the override lever, and override lever does not change position, then most likely problem is worn trippers need to be replaced.
Intermatic 156T1978A tripperBuy: trippers
156T1978A set 2
156T1978A trippers
PA115 - 25 sets

-If the trippers are sliding past the override lever, and new trippers do not solve problem, then replace timer module.
Buy:
T101M 120 volt mechanism only
T104M 240 volt mechaism

- Undersized wire and breaker can cause malfunctions.
- Check that motor load is working correctly. Look at rating plate on motor for voltage and amperage requirements.
- Convert control center timers to either 120 Volt or 240 volt by changing clock motor
Buy:
240 volt clock motor for T10404R
120 volt clock motor for T10101R

-If the above steps check OK, then check terminal connections and wires. Max 2 wires under a terminals. Do not use stranded wire. Clean corroded wires with sandpaper, or use white vinegar to help dissolve build-up on terminals. Tighten screws very tight against copper wire. Use only copper wire. 
T101M

Mechanism only
Use thumb spring located top inside timer to remove old mechanism from enclosure


Buy:
T101M 120 volt mechanism only
T101 series 120 volt timers
T104M 240 volt mechaism
T104 series 240 volt timers
T104M201 mechanism with fireman switch


clean and straighten wire ends
Insdulation under screw plate
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Both wires MUST be same gauge
Straighten each wire 
Tighten screw very tight against copper wire



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Connect stranded and solid with wire connector and run jumper to screw plate. 
Or add solder to stranded wire to make solid.
See example image
10-3-wire
10-3-wire  12 Ga
10 gauge or 12 gauge?
10 gauge is larger/ for 30 amp breaker. 12 gauge is smaller/ for 20 amp breaker
10 gauge wire can have black-white or black-red
12 gauge will have black and white wires

Buy short pieces 10 and 12 gauge wire at local box store
Compare with your wire.
Resource:
Match color code and amp rating for wire
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single-pole breaker
120 Volt
Push down breaker
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double-pole breaker
240 Volt
Push down breaker
Plug-in breakers
Fits residential panels
Buy double-pole:
Siemens 15-125 amp
Resource:
See inside main breaker box


Buy indoor/ outdoor subpanel:
120-240 Volt
Subpanels at Amazon
Use up to rated amps

Resource:
How to wire subpanel

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10-2 gauge/ 30 amp
10-3/ 30 amp

NMB is house wiring
UF is underground
Resource:
Match breaker and wire size

Buy:
12-2 gauge/ 20 amp
12-3/ 20 amp

NMB is house wiring
UF is underground

box timersResource:
Compare box timers
DPDT timers
Intermatic
Control water heater w/ Z-wave
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Intermatic control centers: and parts
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