great company to work with, from tech support to delivery of my parts ( A+)On 05/01/2024 by M. K. (verified customer)
A thermistor is a semiconductor that changes resistance with temperature changes (as the temperature goes up, the resistance goes down). Tstats and High-limits can be found on older spas and have the same functionality as the Hi-limit/Control Thermistors.
Showing all 24 results
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Replaces the obsolete 39525 and obsolete 39204 Newly designed and includes o-ring This high-limit thermistor sensor is a safety device designed to communicate with the system to shut down the heater if the water temperature exiting your heater exceeds 118 ...read more
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Sku: 79006
Thermistor, Control Thermostat, Watkins No Fault Heater, Hot Spring, Tiger River and Limelight
Replaces the obsolete 39530 and obsolete 39205 Newly designed and includes o-ring This control thermistor is a safety device that measures the water temperature of your spa and communicates that temperature reading to the Motherboard It simply screws ...read more -
Replaces 38415 Newly designed and includes o-ring This control thermostat thermistor sensor detects the spa waters temperature and relays that information back to the system It simply screws into the No Fault Heater Housing (hand tight only) and plugs ...read more
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Replaces 38416 Newly designed and includes o-ring This high-limit thermistor sensor is a safety device designed to communicate with the system to shut down the heater if the water temperature exiting your heater exceeds 118 degrees F It simply screws ...read more
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Sku: 34878
O-Ring, Control Thermistor
Control Thermostat Thermistor o-ring for the 79006 and 78970 thermistors This o-ring is located on the "inlet" side of the heater and is the larger of the two thermistor o-rings For the outlet side of the heater see the part# 34879 o-ring -
Sku: 34879
O-Ring, Hi-Limit Thermistor
High-Limit Thermistor o-ring for the 79005 and 78969 thermistors This o-ring is located on the "outlet" side of the heater and is the smaller of the two thermistor o-rings For the "inlet" side of the heater see part 34878 -
This control thermostat was mounted in the control box directly behind the temperature dial on all Hot Spring models from 1989-1993 It was mounted on the under the top-side control panel on all Tiger River models from 1992-1994
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Sku: 30208
Hi-Limit, Spa, 120 Degree, Hot Spring
This Spa Hi-Limit thermostat (aka spa reset or tub reset) is a safety device designed to prevent damage to the spa that would occur if the spa overheated The probe of this high-limit resides in a "drywell" along with the thermostat probe The spa high-limit ...read more -
Sku: 30203
Thermostat, Control, Hot Spring
This Control Thermostat is the replacement for all Hot Spring manufactured from 1986-1988 Notes: The numbers on the control panel temperature dial do not correspond to any specific temperature They are a convenient way to mark where a person likes the ...read more -
Sku: 30118
Cordgrip, Thermostat
This cord grip fitting is what seals around the 30203 and the 75077 control thermostats copper wire May require the 30690 adapter (not included) -
This Heater High-Limit (red heater reset button) is the replacement for the Hot Spring Classic (Model D)
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Sku: 70106
Thermowell, Hot Spring
This thermowell (dry well) houses the spa high limit capillary (probe) and the thermostat probe in the 1989-1990 Hot Spring Sovereign (a k a Indoor/Outdoor model), 1989-1990 Prodigy (aka Home Spa) and the 1989-1994 Jetsetter -
Sku: 39204
Thermistor, High-Limit, Hot Spring, Tiger River, Limelight
This item is obsolete and replaced by:
79005This high-limit thermistor sensor is a safety device designed to communicate with the system to shut down the heater if the water temperature exiting your heater exceeds 118 degrees F It simply screws into the No-Fault Heater Housing (hand tight only) and ...read more -
Sku: 39205
Thermistor, Control Thermostat, Hot Spring, Tiger River and Limelight
This item is obsolete and replaced by:
79006This control thermostat thermistor is a safety device designed to communicate with the system to shut down the heater if the water temperature exiting your heater exceeds 118 degrees F It simply screws into the No-Fault Heater Housing (hand tight only) and ...read more -
Sku: 38415
Thermistor, Control Thermostat, Hot Spring and Tiger River
This item is obsolete and replaced by:
78970This control thermostat thermistor sensor detects the spa waters temperature and relays that information back to the system It simply screws into the No Fault Heater Housing (hand tight only) and plugs into the outside of the spa's control box If your ...read more -
Sku: 38416
Thermistor, High-Limit, Hot Spring and Tiger River
This item is obsolete and replaced by:
78969This high-limit thermistor sensor is a safety device designed to communicate with the system to shut down the heater if the water temperature exiting your heater exceeds 118 degrees F It simply screws into the No-Fault Heater Housing (hand tight only) and ...read more -
Sku: 30209
Hi-Limit, Heater, 150 degree, Hot Spring
OBSOLETE: This Heater Hi-Limit (red "heater reset" button) is designed to kill power to the heater if the core temperature exceeds 150 deg The probe of this high-limit is inserted into the end of the heater element and surrounded with plumbers putty to ...read more -
OBSOLETE This is the replacement thermistor for all 1994 Hot Spring spa models and 1995-1998 Hot Spot RE, RLX, SE & SLX spa models This Control Thermostat Thermistor communicates the actual water temperature to the controller to shut off the heater ...read more
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Obsolete: No factory suggested replacement available at this time Please contact our technicians for advice (805) 541-9000 or wizard@backyardplus com This obsolete electronic high-limit is the replacement for the 1995-1996 Hot Spring Grandee, Highlife, ...read more
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OBSOLETE This Electronic Control Thermostat (thermistor included) replaces the mechanical thermostats in the 1994 Hot Spring Classic, Grandee, Highlife, Jetsetter, Prodigy, and Sovereign spa models This retrofit remedy was introduced to solve the ...read more
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Sku: 85005-BYP
Control Box Components, Hot Spring
OBSOLETE This rebuild kit includes all the original components found inside the control box of a 1990-1993 Hot Spring Classic, Sovereign, Indoor-Outdoor, Prodigy, Home Spa and Jetsetter For those of us who want to start with a clean slate, everything ...read more -
OBSOLETE This rebuild kit includes the OEM replacement components inside the control box of a pre-1989 Hot Spring Classic, Indoor/Outdoor, Jetsetter, Home Spa and Personal spa All components are for the 115 volt Hot Spring not the 220 volt models
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Obsolete: No factory suggested replacement available at this time Please contact our technicians for advice (805) 541-9000 or wizard@backyardplus com This electronic thermostat is the replacement for the 1995-1996 Hot Spring Grandee, Highlife, Landmark, ...read more
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Obsolete: No factory suggested replacement available at this time Please contact our technicians for advice (805) 541-9000 or wizard@backyardplus com This Control Thermostat is a bulb and capillary type thermostat coated with Teflon due to the direct ...read more
Showing all 24 results