73790-PDR Titanium Heater, 1.5kW/6kW (Factory Upgrade Replacement)

Item #: 73790
$386.08

73790 This 2015 No-Fault PDR (power down reset) Titanium Heater is the newest factory upgrade replacement heater from the makers of Hot Springs spas. Its double-pass sleek design replaces all previously discontinued heater styles. The double-pass feature efficiently heats the water in two stages and the titanium withstands corrosion. Now factory approved and warrantied for all 115 volt 1.5kW and 230 volt – 6kW installations for all 1995-now Hot Spring and Tiger River spa models. For 4kW, 230 volt applications see the 73791 PDR.

Note:  It is highly recommended to purchase new thermistors, 79006 and 79005, with this heater. The inlet thermistor port on these style heaters may require a wrench to thread in the thermistor. If your existing thermistors plug in to the OUTSIDE of your control box, please use item 78970and 78969 as replacement thermistors. This heater comes with new thermistor o-rings.

This part can be found on many Limelight, Hot Spring, Tiger River models from 1995 to 2021

View compatibility table & diagrams

  • Add Hi-Limit Thermistor (plugs OUTSIDE control box)?

  • Add Control Thermistor (plugs OUTSIDE control box)?

  • Add Control Thermistor (plugs inside control box)?

  • Add Hi-Limit Thermistor (plugs inside control box)?

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SKU: 73790 Categories: , Tags: ,

Description

This 2015 No-Fault PDR Titanium Heater is the newest factory upgrade replacement heater from the makers of Hot Springs spas. Its double-pass sleek design replaces all previously discontinued heater styles. The double-pass feature efficiently heats the water in two stages and oh what a perfect job it does! Now factory approved and warrantied for all 115 volt 1.5kW and 230 volt – 6kW installations for all 1995-now Hot Springs and Tiger River spa models. For 4kW, 230 volt applications see the 73791 PDR. Your existing 3/4″ vinyl tubing will attach to this heater with no worries. The thermistors have different thread sizes to insure they can’t accidentally be reversed when re-installing them into this new PDR heater. They also have different tips on the ends of the wire to insure they can’t accidentally be plugged into the wrong port on the IQ Control Box.

This replacement heater doesn’t have a plug on the end of the power cord like on the 1995-1996 spas. In most applications, the heater is connected directly inside the spas control box. If your existing heater plugs in to the bottom of your control box, you may need the appropriate adapter. Adapters are listed next to your spa model on the chart below.

Note: The 73791 can be used as an alternative to this heater in a spa that’s wired 230 volts. Some service techs prefer the 4kW PDR to this 6 kW siting that it puts less strain on old/weakening 30 amp GFCI breakers.
73790 draws 25 amps (wired 230 volts)
73791 draws 16 amps (wired 230 volts)

Tip: You can also utilize the cord end (plug) from your old No Fault heater and splice it onto a PDR if needed.

*Your heater may look like one of these discontinued heaters below:
Used 1995-1996 Used 1997-2003 Used 1997-2003
Both Hot Spring
& Tiger River
(No-Fault 1500 & 5500
Hot Spring only
(No-Fault 6000)
Both Hot Spring
& Tiger River
(No-Fault 4000 & 6000)

Note#1: This PDR (power-down-reset) heater eliminates the manual reset button, which means that you never need to remove the equipment door to reset the heater. Simply power down the spa for 30 seconds by either tripping off the GFCI breakers in the sub panel (on 230volt models) or unplugging the spa (115volt models). Yay for this massive improvement! There is something about the manual reset circuitry on heaters that causes them to expire prematurely. This heater replaces all heaters in all 1995-now Hot Spring, Tiger River and Limelight hot tubs which includes the No Fault 6000 heaters, Watkins No Fault 5500 and the No-Fault 1500 cartridge style heater.

Note #2:  It is highly recommended to purchase new thermistors, 79006 and 79005, with this heater. The inlet thermistor port on these style heaters may require a wrench to thread in the thermistor. If your existing thermistors plug in to the OUTSIDE of your control box, please use item 78970and 78969 as replacement thermistors. This heater comes with new thermistor o-rings.

Replacement Hint: It’s easier to replace a heater if the spa is drained. However, some folks leave the water in the spa, disconnect the vinyl tubing from their old heater and insert wine corks into the ends of the vinyl tubing. This insures a minimal amount of water loss during the change out. Clever repair techs use radiator hose pinch off pliers to clamp off the tubing.

View compatibility table & diagrams

Ref. Diagram
# 1 PDR Heater (Limelight 2019 - 2019) View Diagram
No Fault 5500 Cartridge Heater 1995-1996 (Hot Spring 1995 - 1996) View Diagram
# 2 No Fault Heater 1997-2002 (Hot Spring 1997 - 2000) View Diagram
# 3 Heater (95-96) 70914 & 70915 (Hot Spring 1995 - 1996) View Diagram
Heater Factory Install (1994) (Hot Spring 1995 - 1996) View Diagram
# 2 No Fault Heater (Limelight 2012 - 2017) View Diagram
brand model years
Limelight Beam I (BMI) 2019
Limelight Beam II (BMII) 2019
Hot Spring Grandee (G) 2007
Hot Spring Prodigy (H) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
Hot Spring Prodigy (HN) 2019, 2020, 2021
Hot Spring Sovereign (I) 2007, 2008, 2009, 2010
Hot Spring Sovereign (II) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
Hot Spring Sovereign (IIN) 2019, 2020, 2021
Hot Spring Jetsetter (J) 2007, 2008, 2009, 2010
Hot Spring Jetsetter (JJ) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
Hot Spring Jetsetter JJN (JJN) 2019
Hot Spring Highlife Jetsetter NXT (JTN) 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
Hot Spring Vanguard (V) 2007
Hot Spring Vanguard (VV) 2007, 2008, 2009, 2010, 2011, 2012, 2013
Hot Spring Accolade (AC) 2005, 2006
Hot Spring Classic (F) 1997, 1998, 1999, 2000
Hot Spring Highlife Limited Edition (ILE) 2003
Hot Spring Landmark (S) 1997, 1998, 1999, 2000, 2001, 2002, 2003
Hot Spring Triumph TRHN (TRHN) 2019, 2020, 2021
Limelight Bolt (BLT) 2012, 2013, 2014, 2015, 2016, 2017
Hot Spring Classic (F) 1995, 1996
Hot Spring Classic 230v. (FH) 1995, 1996
Hot Spring Grandee (G) 1995, 1996
Hot Spring Grandee (GQ) 1996
Hot Spring Prodigy (H) 1995, 1996
Hot Spring Sovereign (I) 1995, 1996
Hot Spring Sovereign 230v. (IH) 1995, 1996
Hot Spring Sovereign 230v. (IHQ) 1996
Hot Spring Sovereign (IQ) 1996
Hot Spring Jetsetter (J) 1995, 1996
Hot Spring Jetsetter (JQ) 1996
Hot Spring Highlife (K) 1995, 1996
Hot Spring Summit (R) 1995, 1996
Hot Spring Landmark (S) 1995, 1996
Tiger River Siberian (L) 1995, 1996
Tiger River Khyber (LH) 1995, 1996
Tiger River Bengal (M) 1995, 1996
Tiger River Manora 230v. (MH) 1995, 1996
Tiger River Tondi Round (P) 1995, 1996
Tiger River Tondi Round 230v. (PH) 1995, 1996
Hot Spring Classic (F) 1997, 1998, 1999, 2000, 2001, 2002
Hot Spring Classic (FQ) 1997, 1998, 1999, 2000, 2001, 2002
Hot Spring Grandee (G) 1997, 1998, 1999, 2000, 2001, 2002
Hot Spring Grandee (GQ) 1997, 1998, 1999, 2000, 2001, 2002
Hot Spring Prodigy (H) 1997, 1998, 1999, 2000, 2001, 2002
Hot Spring Prodigy (HQ) 1997, 1998, 1999, 2000, 2001, 2002
Hot Spring Sovereign (I) 1997, 1998, 1999, 2000, 2001, 2002
Hot Spring Highlife Limited Edition (ILE) 2002
Hot Spring Sovereign (IQ) 1997, 1998, 1999, 2000, 2001, 2002
Hot Spring Jetsetter (J) 1997, 1998, 1999, 2000, 2001, 2002
Hot Spring Jetsetter (JQ) 1997, 1998, 1999, 2000, 2001, 2002
Hot Spring Landmark (S) 1997, 1998, 1999, 2000, 2001, 2002
Hot Spring Landmark (SQ) 1997, 1998, 1999, 2000, 2001, 2002
Hot Spring Vanguard (V) 2001, 2002
Hot Spring Vanguard (VQ) 2001, 2002
Tiger River Caspian (CHP) 2004
Tiger River Caspian (CPN) 2003
Tiger River Siberian (L) 1997, 1998, 1999, 2000, 2001, 2002
Tiger River Siberian (LA) 1997
Tiger River Siberian (LQ) 1999
Tiger River Bengal (M) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
Tiger River Bengal (MA) 1997
Tiger River Bengal (MM) 2005
Tiger River Bengal (MQ) 1999
Tiger River Sumatran (N) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
Tiger River Sumatran (NA) 1997
Tiger River Sumatran (NQ) 1999
Hot Spring Classic 230v. (FH) 1995, 1996
Hot Spring Prodigy (H) 1995, 1996
Hot Spring Sovereign (I) 1995, 1996
Hot Spring Landmark (S) 1995, 1996
Hot Spring Highlife (K) 1995, 1996
Limelight Bolt (BLT) 2012, 2013, 2014, 2015, 2016, 2017
Limelight Beam I (BMI) 2018

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