Hydro-Quip Gecko 4-Pole 3 Wire Hi Limit Sensor with 1/4 Inch Bulb$7499
Quick overview
- Gecko 4-pole 3 wire Matched to the Gecko plug style, which is what decides whether a sensor will fit at all.
- 1/4 inch bulb The sensing bulb diameter, so it seats correctly in the sensor well.
- 14 inch lead Long enough to reach from the well back to the board on the packs it is used with.
- Safety device The hi limit is what shuts the heater down before the water gets dangerously hot.
- Common failure A bad hi limit is a classic cause of nuisance heater lockouts and overheat errors.
- Hydro-Quip part Ordered by part number 34-0201 rather than by matching a picture.
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Product details
The Hydro-Quip 34-0201 is a hi limit sensor for Gecko spa controls. It uses the Gecko 4-pole 3 wire connector, has a 1/4 inch sensing bulb and a 14 inch lead.
What it protects
The hi limit is the safety sensor at the heater. It is not the one that holds your set temperature; its job is to notice when the water at the heater has gone past a safe point and shut the heater down before anything is damaged or anyone is scalded. Because it is a safety device, a spa will refuse to heat rather than run without a working one.
The symptom that leads here
Repeated overheat or hi limit faults on a spa whose water is plainly not hot. A sensor that has drifted out of range or failed open reports a temperature that is not real, and the controller does the safe thing and locks the heater out.
Getting the right one
The connector is what matters most. Count the poles and wires on the sensor you are removing and confirm it is the Gecko 4-pole 3 wire style before ordering.
| Brand | Hydro-Quip |
|---|---|
| Manufacturer part number | 34-0201 |
| Type | Hi limit sensor |
| Connector | Gecko 4-pole 3 wire |
| Bulb diameter | 1/4 inch |
| Length | 14 inch |
| Shipping weight | 1 lb |
| Ships | Parcel |
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