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Hot Tub Thermistors

Thermistors are semiconductors that alter resistance with changes in temperature. As the temperature rises, the resistance goes decreases. The average lifespan of a hot tub or spa Thermistor is six to eight years. Hot Spring and Tiger River thermistors connect to the spa control box, and screw into the heater.

Find the right replacement part - To determine which Thermistor is right for your Hot Tub or Spa please use the table below:

ManufacturerDate of ManufacturePart No.Part Type
HotSpring1995 - 200138415Control Stat
1995 - 200138416Hi Limit
2002 - Current39525Control Stat
2002 - Current39530Hi Limit
Tiger River1995 - 200138415Control Stat
1995 - 200138416Hi Limit
2002 - Current39525Control Stat
2002 - Current39530Hi Limit
LimeLight2008 - Current39525Control Stat
2008 - Current39530Hi Limit
HotSpot1999 - 200571578Control Stat
2006 - Current73993Control Stat
2006 - Current73994Hi Limit
Solana1999 - 200571578Control Stat
2006 - Current73993Control Stat
2006 - Current73994Hi Limit

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  1. Thermistor 73994

    Thermistor 73994

    £20.24
    Thermistor Learn More

  2. Thermistor 39525

    Thermistor 39525

    £21.12
    2002 on Learn More

  3. Thermistor 38415

    Thermistor 38415

    £21.12
    1995-02 HotSpring Learn More

  4. Thermistor 39530

    Thermistor 39530

    £21.12
    2002 on Learn More

  5. Thermistor 38416

    Thermistor 38416

    £21.12
    1995-02 HotSpring Learn More

  6. Thermistor 73993

    Thermistor 73993

    £35.32
    Thermistor Learn More

  7. Thermistor 71578

    Thermistor 71578

    £36.74
    99-05 HotSpot, Solana Learn More

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