A successful manual run proves the controller can activate the station circuit. The fault is usually schedule logic: the dial is not in AUTO RUN, no valid start time or watering day exists, a rain sensor is active, or seasonal adjustment has effectively reduced watering.
Match the pattern before opening anything
| Possible cause | Best clue | First check |
|---|---|---|
| Dial not in AUTO RUN | Manual operation works from the faceplate | Return the dial to AUTO RUN |
| No valid program start | Run times exist but no cycle begins | Check start time and watering days |
| Active or open sensor circuit | Sensor indication blocks automatic watering | Use the documented bypass test |
| Seasonal adjustment | Runs are missing or much shorter than expected | Compare adjustment with 100% |
Read the system before replacing a part
Use the observation that most closely matches your yard. Each row changes the next test, so you do not spend an afternoon proving the wrong theory.
What it meansThe TM2 output and that field path can operate.
Do nextStay with AUTO RUN position, program, day, start, runtime, sensor, and delay.
What it meansAutomatic watering is intentionally blocked.
Do nextReturn it to AUTO RUN after documenting settings.
What it meansThe controller can inhibit scheduled watering.
Do nextUse the manual's sensor bypass test; do not permanently defeat a real sensor.
What it meansThe visible start cannot borrow that runtime.
Do nextAlign start time, watering day, and station runtime inside one program.
Four tests that narrow the fault
Stop as soon as one result gives you a clear boundary. The goal is not to perform every test; it is to eliminate whole groups of causes safely.
- 01
Prove one station manually
Run the affected station for two minutes from the TM2 faceplate.
IF YES / NORMALHardware operation is available; do not replace the valve.
IF NO / ABNORMALUse the station-level electrical diagnosis first.
- 02
Audit the same program
Select one program and verify current clock, eligible day, start time, and nonzero station runtime without switching programs mid-audit.
IF YES / NORMALAll gates belong to one program.
IF NO / ABNORMALMove or recreate only the mismatched setting.
- 03
Check operating and inhibit states
Return the dial to AUTO RUN and record sensor, delay, and seasonal-adjust status.
IF YES / NORMALNo override blocks the next event.
IF NO / ABNORMALThe displayed inhibit state determines the correction.
- 04
Schedule an observed start
Set a short permitted test several minutes ahead and watch the display through the start.
IF YES / NORMALAutomatic operation is restored.
IF NO / ABNORMALThe exact display at the missed minute is evidence; photograph it before reset.
Numbers worth measuring
At 50%, a 10-minute runtime becomes 5 minutes; use 100% temporarily to isolate schedule logic.
Common fixes that waste time
That run already energized the solenoid and opened the valve.
Program settings do not combine across programs.
A short diagnostic bypass should not become a permanent water-wasting workaround.
How the evidence changes the repair
An ESP-TM2 watered manually but missed every scheduled morning.
- The dial was in AUTO RUN and the clock was correct.
- Program A had a valid 5:30 a.m. start.
- The lawn stations had runtimes only in Program B, which had no start.
Nothing electrical was broken. Aligning start and runtimes inside Program A restored automatic watering while preserving the other schedule.
How to confirm the repair actually held
A single successful start can hide an intermittent splice, sticky valve, remaining leak, or scheduling problem. Recreate the original conditions before calling the job finished.
Pass: The original symptom does not return during the direct test.
If not: Stop and repeat the last dividing test; the fault boundary was incomplete or intermittent.
Pass: Automatic behavior now matches the documented controller state.
If not: Hardware may be repaired while schedule, sensor, program, or connectivity logic remains separate.
Pass: The repair holds under normal time, load, moisture, and network conditions.
If not: Use the first changed condition to identify the remaining intermittent cause.
Recognize the controller state
Original diagnostic reconstruction. Not a photograph of the product and not copied from a competitor.
Check these in order
- 01
Prove the hardware with one manual station
Run one zone for two minutes. If it waters normally, do not start by replacing the valve or solenoid. The controller-to-valve path has just passed a useful test.
- 02
Return the dial to AUTO RUN
The ESP-TM2 must be left in its automatic operating position. A correct schedule cannot launch while the controller is intentionally off or left in a programming position.
- 03
Audit one program from beginning to end
Confirm current date and time, at least one watering day, one intended program start time, and a non-zero run time for each included station. Start times belong to the program, not individual stations.
- 04
Test the rain-sensor explanation
If a sensor is installed, allow it to dry or use the controller's documented sensor bypass for a short diagnostic test. If no sensor is installed, verify the required jumper is present as shown in the manual.
- 05
Check seasonal adjustment and delays
Return seasonal adjustment to its normal baseline for testing and clear any temporary delay. Then set a start several minutes ahead and watch the display through the expected start.
- Manual watering becomes intermittent as well.
- The sensor wiring or jumper arrangement does not match the manual.
- Programs disappear or the clock repeatedly resets after power loss.
What homeowners ask about this symptom
Can the rain sensor block automatic but not manual watering?
Yes, depending on the manual mode used and controller configuration. That makes sensor status a strong suspect when scheduled watering fails but a manual test succeeds.
What should seasonal adjust be for testing?
Rain Bird identifies 100% as the nominal ESP-TM2 setting. Use that baseline temporarily while isolating a schedule problem.
Sources and review notes
General maintenance logic is checked against EPA WaterSense outdoor irrigation guidance. Product controls and disassembly steps vary by model; use the current manufacturer manual for your exact valve, controller, or sprinkler head.
Published and last reviewed: August 30, 2026