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Watkins 73791 Heater, 4.0KW, No Fault PDR, IQ2020, IQ2000

  • Manufactured by: Watkins Manufacturing Corp.
  • Part Number: 73791


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Item Number: 20-52-4040

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The Watkins 73791 No Fault 4000 watt PDR heater assembly can replace heaters in Hot Spring, Tiger River, Caldera hot tubs from 2003 to 2009 and more.

The existing 3/4" vinyl tubing and thermistors will connect with this heater.
A wrench may be needed to loosen the termistors.
Typically the sensors go back in hand tight only but in some cases a lightly applied wrech is needed.

This is a PDR heater (power down reset).
Simply power down the hot tub, wait 30 seconds and the heater will be reset.
Tip: A heater that needs to be reset is often a sign of a bad heater and/or bad heater relays and should be replaced.

ATTENTION: This heater connects directly to the circuit board or heater relays.
It does not have a plug on the end of the power cord.
Hot tubs from 1995 to 1996 will need to re-use the old power cord plug and splice it into this new heater's power cord end.

If a red light is blinking on your hot tub, there may be a problem with the circuit board.
Give us a call and ask about getting your hot tub circuit board repaired.

ATTENTION: This heater does not use a pressure switch (no flow switch).
If your OEM heater has a pressure switch then you need the Watkins 76228 heater instead.

The Watkins 73791 low-flow heater assembly has the following features and specifications.

Series: No Fault PDR, IQ2020, IQ2000 (but not limited to, unless specified otherwise above).
Kilowatt Rating: 4.0KW
Temperature Sensor Included: No
Hi-Limit Sensor Included: No

Cross Reference
The Watkins 73791 heater can also replace the following part numbers (but not limited to).



The Watkins 73791 heater can be replaced by the heaters shown below in RELATED PRODUCTS

  • Manufactured by: Watkins Manufacturing Corp.
  • Part Number: 73791
  • Item Number: 20-52-4040

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