Raypak Electric Pool Heater Thermostat | 003346F
Raypak
SKU: 003346F
Raypak 003346F Mechanical Thermostat Temperature Control Kit (Pool / Electric Spa) – 66°F to 106°F
The Raypak 003346F is a replacement mechanical thermostat temperature control kit used on many Raypak pool heaters (including millivolt/mechanical control models) and select Raypak electric spa/heater applications. It provides adjustable water temperature control and is commonly replaced when the heater won’t regulate temperature correctly, won’t maintain a setpoint, or the control becomes worn or unreliable.
Key Features
- Part Number: 003346F
- Type: Mechanical thermostat / temperature control kit
- Control Range: 66°F to 106°F
- Function: Regulates heater water temperature based on the thermostat setting
- Application: Commonly used on Raypak mechanical thermostat heater controls (varies by model and revision)
Common Compatible Heater Families (Verify by Model/Serial)
- Raypak 53 / 53A / 53B
- Raypak 055A / 055B
- Raypak 105A / 105B
- Raypak 130, 151, 153, and other legacy mechanical-control families
- Frequently referenced for mechanical-thermostat versions of Raypak pool heaters across multiple size ranges (confirm exact fit)
What’s Included
- Mechanical thermostat control
- Temperature sensing bulb/capillary assembly (as supplied with the kit)
Common Symptoms This Part Can Help Fix
- Temperature won’t adjust or won’t hold the selected setting
- Heater cycles inconsistently relative to the thermostat dial
- Thermostat knob feels loose, damaged, or the control is physically worn
- Unreliable heat regulation after confirming proper water flow and clean filtration
Installation Notes
- Shut off power and gas (if applicable) before servicing the control area.
- Route the capillary/sensing bulb carefully—do not kink, crush, or sharply bend the line.
- Install the sensing bulb fully into its well/holder per the heater’s design for accurate temperature control.
- If the heater still won’t regulate temperature after replacement, inspect water flow, bypass components, and other safety controls.
Related Products
- Search: Raypak 003346F
- Search: Raypak Thermostats
- Search: Raypak Sensor Wells / Adapters
- Search: Raypak High Limit Switches
- Search: Raypak Pressure Switches
- Search: Raypak Heater Parts
- Shop: Raypak
Installation & Maintenance Tips
- Keep filters clean and verify proper circulation flow—low flow can cause unstable heating behavior and nuisance shutdowns.
- Maintain balanced water chemistry (especially pH and calcium hardness) to reduce scaling that can affect heater performance.
- When servicing controls, keep the control compartment dry and inspect wiring/terminals for corrosion or looseness.
- If temperature control seems inaccurate, confirm the sensing bulb is seated correctly in its well and not damaged or kinked.
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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