V. Error Codes Defined and Their Fix
On 1042 and 1044 Boards:
HtS Board sees the High Limit Sensor has failed, it will give the HtS error or
HtS and Oht.
FIX: Either error, you must replace the High Limit sensor. The problem
could be the board but likely it’s the sensor unless the water IS hot (see
overheating spa problem later). To replace Oh sensor is simple. The
most common OH sensor has 2 crimp connections on one end. The
board has a post for each crimp. The other end is held against the
heater by a clip with a wing nut that clamps the sensor to the heater. On
a limit number of spa models have a high limit “disk” that is held against
the heater with 2 nuts. This is easy to replace. Remove the 2 nuts and
swap new disc. Move wires to same post on new disk and you are done.
tS Board sees failure of the temperature sensor.
FIX: Likely means failure of the sensor. COULD mean failure
of the board but typically and cheaper is the sensor. Gatsby spas have 2
type of temp sensors; dry well and wet well. Dry well means the sensor
inserts into a housing that goes through the spa’s wall. So the sensor is
close to the spas water but not actually in the water. “Wet well” sensors
actual have the tip of the sensor in the water. IF you can touch/see the
stainless steel tip in the water, you have a wet well. Most likely you will
see the sensor in the dry well housing.
Both have one end that consists of two crimp connections.
Simply pull off old and plug in new.
On dry well sensors, you may have a rubber plug or small
twist cap holding the sensor in the well. Remove and swap. On “wet well”
sensors, typically you pull out the old and insert the new. Be aware that
this is a hole in your spa’s shell so if you have water in the spa, it will
pour out. So do quickly or with water below the sensor’s level.
PS2 Board sees the pressure/flow switch is stuck closed.
FIX: Replace pressure or flow switch. Most models have a pressure
switch. Pressure switches screw into the heater. If you have a canister
heater, you remove the black cover and it will expose the pressure
switch. Horizontal heaters have a pressure switch you get access to
through the inside of the control box.
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