What’s included: PDR heater, control and hi limit thermistor, thermistor adapters, wire clips, 1/4″ barbed adapter, & small section of 1/4″ tubing for bleed line.
This after-market 6kw PDR heater is a great option for people looking for a less expensive alternative to the original heater OEM heater. This heater hooks up to 3/4 inch tubing and has a 1/4 inch nipple on the back of the heater for a bleed line to connect.
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 into the bottom of your control box, you may need to utilize the cord end (plug) from your old No Fault heater and splice it onto a PDR.
What is the difference between the OEM and Generic PDR heaters?
There is no technical difference between the OEM and generic PDR heaters. Both heaters have a a 12 month warranty. The only non-technical difference is price, and the OEM heater does not come with the high-limit and control thermistors.
Note: The 73791-AM 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-AM draws 25 amps (wired 230 volts)
73791-AM 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.
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 subpanel (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: The inlet thermistor port on these style heaters may require a wrench to thread in the thermistor.
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 ensures a minimal amount of water loss during the change out. Clever repair techs use radiator hose pinch-off pliers to clamp off the tubing.