Low Voltage Lighting Troubleshooting Guide

All Lights Out –
1)  Check Power at Transformer Socket

  • Check 110-volt plug
  • Check GFI for tripped
  • Check circuit breaker
  • Loose wire at plug
  • Switch in house off

2) Check Timer

  • Bypass timer – pull out timer, plug in cord


One Run of Lights Out

1) Check fixtures

  • Check connection at transformer
  • Is wire cut?
  • Check connection at fixture
  • Bad Lamps
  • Socket at fixture

2) Check Reset Breaker

  • Reset breaker

When your sprinkler system is not working, you must first identify the problem.


  • No sprinklers will come on


  • In most cases, there is a single water source. Check to see if the water is turned on.
  • Automatic systems need power to work. Check your power supply. Normal systems operate on 24 Volts. This requires a step-down transformer. Check your voltage.
  • Rain sensor – Check to see if you have one and is it operating properly.


  • Poor performance
  • If this is a new system – please refer to tips for installing your own sprinkler system. If the system was installed by the previous owner, Call a repair man.


  • Check for broken pipes or sprinklers. You will loose much needed pressure and volume through a broken pipe or sprinkler head.
  • Clogging will occur when a pipe repair is done and mulch & dirt enter the system. Remove nozzles, flush the system, and return to normal.


  • Valve turns on but will not turn off.
  • Most valves are normally closed valves. If a valve fails in the open position, check the following:


  • Trash in the valve – rocks, sticks, pieces of pipe, glue, etc. Many things have been found inside of a valve. Clean it out.
  • A bad diaphragm – torn or indented – replace diaphragm.
  • Freeze damage – cracks in the body of the valve – replace body.
  •  We also rent and sale a valve locator. Here is a quick video on the operation of the valve finder!