Pentair MasterTemp Pool Heater High Limit Switch | 42001-0063S
Pentair
SKU: 42001-0063S
Pentair High‑Limit Switch – Model 42001‑0063S
The Pentair 42001‑0063S is an OEM high‑limit safety switch designed for use in select Sta‑Rite Max‑E‑Therm and Pentair MasterTemp pool & spa heaters. It monitors high temperatures in the heater system and interrupts the electrical circuit if safe thresholds are exceeded.
Key Features:
- Fail‑safe thermal cut‑off switch for heater control systems
- Direct replacement part: 42001‑0063S
- Compatible with Sta‑Rite Max‑E‑Therm and Pentair MasterTemp heater electrical assemblies
Technical Specifications:
- Model / SKU: 42001‑0063S
- Function: High‑limit electrical switch — opens the circuit when the water or heat exchanger exceeds set temperature
- Application: Sta‑Rite Max‑E‑Therm (SR‑series) and Pentair MasterTemp heaters
- Warranty: 1 year limited (check manufacturer terms)
Maintenance Tip: When servicing the heater, always turn off power first. Verify correct part number and settings. Inspect thermal switch for signs of overheating or discoloration. Replace immediately if the heater displays a “HLS” error code or if the switch shows evidence of thermal stress. After installation, perform a system test run to confirm heater resets properly and all safeties are functioning.
SKU: 42001-0063S
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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