Hot Spring Pressure Switch #73995

Sale price$68.84

Pickup available at The Spa Team store in Appleton, WI (located in front of Dick's Sporting Goods)

Usually ready in 4 hours


The pressure switch is a safety device designed to prevent overheating of the spa heater should a low or no-flow condition exist in the spa.

Electrical Operation

The pressure switch is located in the heater circuit. When the switch is closed (proper flow), voltage is transferred to the heater circuit when the control thermostat calls for heat. Activating the relay allows the heater to activate. When the switch is open (low flow), voltage to the heater circuit is interrupted regardless of the state of the control thermostat. This prevents the heater from activating until the low flow condition has been resolved.

WARNING: The pressure switch is a safety device and should never be bypassed or tampered with. Never attempt to calibrate the pressure switch.

The following are some of the common causes of pressure switch tripping:

  • dirty or clogged filters
  • clogged heater return
  • low water level
  1. Disconnect power to the spa.
  2. Remove the equipment compartment door.
  3. Drain the spa or use the plug system.
  4. Open the drain valve to bleed the water out of the plumbing.
  5. Open the control box lid.
  6. Disconnect the pressure switch connection wires from the pressure switch.
  7. Unscrew the pressure switch from the heater and remove any residual Teflon tape from the threads of the heater body where the pressure switch was connected.
  8. Reverse the removal procedure to install the pressure switch in the control box.
    NOTE: Wrap one piece of Teflon tape (in the opposite direction of the threads) three times around the pressure switch threads before installation. When screwing the new pressure switch into the heater, DO NOT use pliers. Grasp the body of the pressure switch, and hand tighten only. After you are finished with the installation, switch the jet pump to high speed and check the pressure switch for leaks.

 73995 Pressure Switch is for the following models:

Make Model Date Range
Hot Spot  Relay 2010-Current
Hot Spot  Rhythm  2010-Current
Hot Spot  Tempo  2010-Current 
Hot Spot  SX  2011-Current 
Hot Spot  TX  2011-Current 
Hot Spot  Mallorca  2006-2009
Hot Spot  Sorrento  2006-2009
Hot Spot  La Palma  2008-2009 
Hot Spot  Tobago  2006-2009
Hot Spot  Trinidad  2006-2009 
Solana  SX  2006-2010
Solana  TX  2006-2010 
Solana  RX  2006-2009  
Caldera Palatino  2010-Current 
Caldera  Marino  2010-Current 
Caldera  Vanto  2011-Current 
Caldera  Aventine  2006-Current
Caldera  Cumberland  2006-2009
Caldera  Olympia  2006-2009
Caldera  Tarino  2013-Current 
Caldera  C 30  2006-2009
Caldera  San Gabriel  2008-2008 
Caldera  Oasis  2006-2009
Caldera  C 45  2006-2009 


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