HotSpring Envoy NXT, Owner'S Manual

Page 27

S

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 I

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GENERAL INFORMATION

Your 

HOT SPRING

 spa has been designed to provide years of trouble-

free use. As with any appliance, problems may occasionally occur 

that require the expertise of a qualified service person. Though such 

simple repairs as resetting a GFCI switch or breaker, or resetting a 

high limit thermostat may not require a service call, they may indicate 

that a more serious condition exists. These conditions may require an 

experienced service person. Before calling for service, please refer to 

the Troubleshooting Guide. Always retain your original sales receipt for 

future reference.

GFCI AND HIGH LIMIT THERMOSTAT

If your spa fails to operate at any time, first check the power supply to 

the spa.
Check each of the GFCI breakers in the subpanel. If a GFCI has tripped, 

reset it. If it will not reset, this may be an indication of a ground fault 

(short circuit) within the electrical components. Contact an Authorized 

Service Technician for a complete diagnosis.
If upon checking the GFCI’s you find that they have not tripped, check 

the house breaker panel and ensure the main breaker for the electrical 

circuit supplying the spa has not tripped. If it has, this is an indication 

that the circuit was either overloaded or a ground fault exists between 

the breaker panel and the spa receptacle or subpanel. Contact a 

qualified electrician.
If upon checking the main house breaker and spa GFCI’s you find no 

failures, check the high limit thermostat. To check it, simply turn off 

power to the spa for 30 seconds. This will automatically reset the high 

limit thermostat if it has tripped. If the spa energizes once you turn the 

power back on, this indicates reduced water flow through the heating 

system. Tripping of the high limit thermostat is normally a result of 

one or a combination of these problems. 1) clogged filter cartridge(s), 

2) blockage within the system plumbing, 3) a non-functioning heater 

circulation pump, 4) power was not disconnected from the spa before it 

was drained, 5) an air lock in the plumbing lines. (The Power Indicator 

on the front of the spa’s control panel will also be blinking if the high limit 

thermostat circuit has tripped.)
If the spa does not function after tripping and resetting the GFCI’s or 

resetting the high limit thermostat, then the problem should be referred 

to an Authorized Service Technician. Refer to the Heater section if the 

spa operates but does not heat, or refer to the Troubleshooting Guide 

for additional service information.

NO-FAULT

 HEATER AND 

INTEGRATED PRESSURE SWITCH

Watkins Manufacturing Corporation unconditionally warrants the 

NO-FAULT

 heater against any failure that would require replacement. 

This warranty’s duration is equal to the time period identified in the 

Component Warranty. This warranty defines unconditional as warranty 

coverage without exception provided that the component has failed to 

operate properly within the spa’s system. This means that conditions 

that would normally invalidate the limited warranty, such as water 

chemistry damage, do not apply to the 

NO-FAULT

 heater.

It is important to note that the 

NO-FAULT

 heater is protected by both the 

heater high limit thermostat circuit and the integrated pressure switch. 

The causes of heater high limit tripping are discussed in the previous 

section.

If the spa is not heating, the red and green lights are blinking, but 

the pump and light are operating, then the pressure switch may be 

open. Opening of the pressure switch is normally a result of one or a 

combination of these problems:
1.  A clogged filter cartridge 
2.  Blockage within the system plumbing 
3.  Power was not disconnected to the spa before it was drained
4.  An air lock in the plumbing lines
5.  Circulation pump not properly working 
Once the problem has been identified and corrected the pressure switch 

will close which will energize the heater.

SILENT FLO

 5000 CIRCULATION 

PUMP AND CIRCULATION PUMP 

THERMAL CUT-OFF

The 

HOT SPRING

SILENT FLO

 5000 circulation pump is a dedicated, 

water cooled, energy efficient, quiet pump that provides continuous 

filtration for the spa. Since the 

SILENT FLO

 5000 pump is water cooled, 

it is equipped with a thermal cut-off to prevent the pump from being 

damaged by running hot when water is not present. 
Reset the circulation pump’s thermal cut-off by disconnecting power to 

the spa and allowing the pump to cool.
Tripping of the thermal cut-off is normally the result of one or a 

combination of these problems: 1) clogged filter cartridge(s), 2) blockage 

within the system plumbing, 3) power was not disconnected to the spa 

before it was drained, or 4) an air lock in the plumbing lines. Once the 

problem has been identified and corrected the pump thermal cut-off will 

be able to be reset which will allow it to operate normally.

MISCELLANEOUS SERVICE 

INFORMATION

The control and high-limit thermostats are equipped with electronic 

sensors that are connected to the spa’s plumbing. Never cut or kink the 

wires that connect the sensors to the thermostats within the control box.
The jet pump is equipped with a thermal overload cutoff switch that is 

designed to protect the pump from overheating. If the pump shuts itself 

off in an older spa, it could indicate failure of the pump motor bearings. If 

the pump shuts itself off in a new spa, it is usually the result of one or a 

combination of the following factors:
•  Thermal overload: Although mass-produced, not all thermal overload 

cutoffs are exactly the same. Some are more sensitive than others and 

will shut the pump off at lower temperatures.

•  High temperature: All 

HOT SPRING

 spa models are equipped with a jet 

pump shroud that vents the heat generated by the pump motor to the 

outside of the equipment compartment, and back into the spa water. If 

the vent is blocked by masonry, grass or debris, overheating of the jet 

pump may occur. Once the pump motor has cooled sufficiently and any 

blockage has been removed from the vent opening, the jet pump can 

be restarted.

•  Friction: Sometimes the moving parts of a new pump are tight enough 

to cause heat build-up due to friction. After a normal break-in period, 

the pump will run cooler.

•  Improper wiring: If the spa is connected with an extension cord, and/

or the house wiring is undersized, the pump may starve for voltage and 

therefore may draw more amperage and generate excessive heat.

Service Information