Pentair Thermistor Probe for 150-400 MiniMax and ThermaFlo Titanium Heat Pump 471566Z
Pentair
SKU: 471566Z
Pentair 471566Z Thermistor Probe for MiniMax and ThermaFlo Titanium Heat Pump
The Pentair 471566Z Thermistor Probe is a genuine replacement temperature sensor used on compatible Pentair MiniMax® pool and spa heaters and ThermaFlo® Titanium heat pump applications. This probe helps the heater or heat pump monitor water temperature so the control system can regulate heating operation properly.
This replacement thermistor probe is commonly used when the heater displays incorrect water temperature, has temperature-sensing issues, cycles improperly, or requires replacement of the original thermistor sensor during heater diagnostics.
Product Features
- Genuine Pentair replacement thermistor probe
- Manufacturer part number: 471566Z
- Also commonly referenced as 471566
- Used for water temperature sensing in compatible heater and heat pump systems
- Fits select MiniMax® 150, 200, 250, 300, 350, and 400 heater models where specified
- Compatible with select MiniMax® NX STD, NT TSI, NT LN, and ThermaFlo® Titanium heat pump applications
- Common replacement during heater temperature-sensor troubleshooting
Product Details
| Brand | Pentair |
| Part Number | 471566Z |
| Alternate Reference | 471566 |
| Product Type | Thermistor Probe / Water Temperature Sensor |
| Heater Series | MiniMax® and select ThermaFlo® Titanium applications |
| Application | Pool and spa heater water temperature sensing |
| Common Use | Replacing a failed, damaged, or inaccurate thermistor probe |
Compatibility
- Pentair MiniMax® 150, 200, 250, 300, 350, and 400 heater models where part number 471566Z is specified
- Pentair MiniMax® NX STD heater applications requiring 471566Z
- Pentair MiniMax® NT TSI heater applications requiring 471566Z
- Pentair MiniMax® NT LN heater applications requiring 471566Z
- Pentair ThermaFlo® Titanium heat pump applications requiring 471566Z
- Replacement applications where the existing probe is marked 471566, 471566Z, or matches the equipment parts diagram
Common Signs This Part May Need Replacement
- Heater displays an incorrect water temperature
- Heater does not respond correctly to the temperature set point
- Heater cycles on and off unexpectedly after other causes have been ruled out
- Temperature reading jumps, drifts, or appears inconsistent
- Thermistor probe wiring, connector, or sensor body is damaged
- Heater diagnostics indicate a water temperature sensor or thermistor issue
- Existing sensor tests outside the expected resistance range during service
Important Notes
- This item is the thermistor probe only.
- Control board, keypad, high-limit switches, pressure switch, unions, headers, heat exchanger, wiring harness, and complete heater are sold separately unless otherwise stated.
- Verify your exact heater model, BTU size, and parts diagram before ordering.
- This part is not universal for all Pentair heaters, MasterTemp® heaters, UltraTemp® heat pumps, or Sta-Rite heater models.
- Temperature-control issues can also be caused by a bad control board, damaged wiring, poor water flow, high-limit faults, scale buildup, or heat exchanger problems.
- Replacing the thermistor probe alone may not correct the issue if the heater control system, wiring, or water flow is faulty.
- Pool heater repairs should be performed by a qualified pool heater technician when electrical or gas components are involved.
Installation Notes
- Turn off electrical power to the heater or heat pump before service.
- Allow the equipment to cool completely before removing temperature-sensing components.
- Shut off the gas supply before working inside a gas heater cabinet.
- Relieve system pressure and follow the equipment service manual before removing the old probe.
- Label or photograph wiring connections before disconnecting the existing sensor.
- Inspect the sensor port, connector, wiring, and surrounding heater components for corrosion or damage.
- Do not overtighten the replacement probe.
- After installation, restore power and confirm the displayed water temperature is reasonable before normal operation.
- If the same fault returns, continue diagnosis of wiring, control board, water flow, and related safety circuits.
Related Products
- Pentair 471566Z Thermistor Probe for MiniMax and ThermaFlo Titanium Heat Pump
- Pentair 471587 MiniMax 115°F Hi-Limit Thermostat
- Pentair 473381 ThermalFlo / UltraTemp 2" x 2" Union with O-Ring
- Pentair 274440Z Bulkhead Ring Adapter Nut for MiniMax Plus 200-400
- Pentair 071515 MiniMax Pilot Generator Q313A with Clip
- Pentair 471083 MiniMax Heater Quick Flange II Kit, 1-1/2" Threaded Connection
Maintenance Tips
- Keep heater water flow within the manufacturer’s recommended range.
- Maintain proper pool water chemistry to help reduce scale buildup and corrosion.
- Inspect heater wiring and sensor connections during routine service.
- Do not ignore repeated heater temperature faults or unusual temperature readings.
- Keep the equipment pad dry and protected from water leaks that can damage electrical components.
- Have recurring heater shutdowns or temperature-sensing issues diagnosed before replacing multiple parts.
Questions about returns? View our return policy.
Hours Of Operation:
Monday - Friday: 7:00 am to 5:00 pm Phoenix Time
Saturday: 8:00 am to 2:00 pm
Sunday: Closed
- We do not ship on Saturday or Sunday.
- Orders totaling more than $300 will require signature confirmation upon delivery.
- We process and prepare orders for shipment within 1 business day. Please note that many other pool supply retailers require 3–5 days of handling time before shipping.
- Orders placed after 1:00 pm Phoenix Time may not be eligible for same-day shipment.
- Expedited shipping options are available at checkout.
Return Policy:
- Products that are received damaged will receive a refund in store credit.
- Most products are eligible for return within 30 days of receipt, except where noted below.
- To initiate a return, please complete an RMA form prior to sending your item back.
- Original shipping costs are non-refundable and will be deducted from the return credit.
- Items returned missing accessories or original packaging, or that are not in the same condition as received, may be subject to a restocking fee of up to 100% depending on the condition of the item upon return.
- Some returns will be charged an automatic 15% restocking fee.
- We are unable to issue refunds for items that have been damaged or rendered inoperable due to installer error.
- Please complete the return form to receive your RMA number and return shipping label.
- Chemical products are not eligible for return under any circumstances.
- The Pentair Colorsync 618031 is not eligible for return.
- Pool cleaners are not eligible for return.
- Opened seals and o-rings are not eligible for return.
- Capacitors are not eligible for return.
- Plastic popup tools are not eligible for return.
- Automation components and circuit boards are not eligible for return.
- If a light is returned due to a reported malfunction and is found to be fully operational upon testing, return shipping costs and a restocking fee will be deducted from the refund.
- Orders refused at the time of delivery will be subject to the original shipping costs being deducted from the refund.
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