Spa does not run, no power, nothing works.
possible cause

• Fuse
• GFCI
• Input Wiring
• High-limit switch

2
Spa runs, but does not heat; insufficient heat; chattering contactor.
possible cause

• Flow/Pressure Switch
• Thermostat
• Heater Contactor/Relay
• Heater Element
• Spa Side Control
• Filter Cartridge

3
Excessive heat.
possible cause

• Thermostat
• Heater Contactor/Relay
• Spa Side Control

4
No low speed pump; no ozonator function.
possible cause

• Pump Air Switch
• Blower Air Switch
• Time Clock
• Thermostat
• Contactor/Relay
• Pump Motor

5
Continuous low speed.
possible cause

• Time Clock
• Thermostat
• Contactor/Relay
• Pump Motor

6
No high speed.
possible cause

• Pump Air Switch
• Pump Motor

7
Continuous high speed; both speeds at once.
possible cause

• Pump Air Switch
• Pump Motor
• Contactor/Relay

8
No blower.
possible cause

• Blower Air Switch
• Blower Motor

9
Continuous blower.
possible cause

• Blower Air Switch

10
No light.
possible cause

• Light Air Switch
• Light Transformer
• Light Fuse
• Lamp

11
No ozone.
possible cause

• Ozonator

12
GFCI keeps tripping.
possible cause

• GFCI
• Heater Element

13
Reduced water flow.
possible cause

• Filter Cartridge
• Pump

14
High-limit trips erratically; trips at end of heat cycle.
possible cause

• High-limit Switch
• Filter Cartridge
• Pump
• Heater element

15
Burnt wires; melted insulation.
possible cause

• Terminal Connections

16
No water flow; pump motor humming.
possible cause

• Pump

17
Spa leaks.
possible cause

• Pump Seal
• Heater Manifold
• Valves
• Plumbing
• Jets
• Spa Shell