Troubleshooting: Topside Displays "Sn." (240V)
Resolve the "Sn." sensor fault code on Dream Maker 240V spa control panels.
Common Control Panel Problems This Guide Covers
A pool technician should open this document when the spa's topside display shows an "Sn" error code, indicating a potential issue with heater temperature sensing or water flow..
What it helps you resolve
- Sn error code displayed on control panel
- spa heater not maintaining temperature
- temperature sensors giving inconsistent readings
- water flow issues affecting heater operation
- faulty circuit board related to heating
When not to use
This document is not the right one to reach for if the pump is not running at all, as that specific issue is covered in a separate troubleshooting guide.
Fault codes covered
Quick diagnosis
Before replacing any parts, confirm proper voltage at the system pack terminal block and GFCI, ensure the pump is running with satisfactory jet output, and put the system pack in "test mode" to display individual sensor temperatures.
Still seeing issues with your Troubleshooting: Topside Displays "Sn." (240V)?
Our certified technicians know every fault code in this document, including HOT, SN, and can diagnose your Dream Maker control panel in person across the Oak Island area.
Request ServiceDream Maker Control Panel FAQs
What does the "Sn" error code mean on my Dream Maker spa?
The "Sn" error indicates that the two heater temperature sensors are detecting a temperature difference greater than 2 degrees, suggesting inadequate water flow, faulty sensors, or a faulty circuit board.
Will the "Sn" error clear itself, or do I need to take action?
The "Sn" error will not clear on its own; it requires troubleshooting to identify and resolve the underlying cause, such as water flow issues or sensor replacement.
What are the most common causes for the "Sn" error code?
The most common causes for the "Sn" error are inadequate water flow through the heater, faulty heater temperature sensors, or a faulty circuit board in the system pack.
How does this guide differ from pump operational troubleshooting?
This guide focuses on diagnosing the "Sn" error related to heater temperature sensing and water flow, while pump operational troubleshooting is a separate guide for when the pump is not running.
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Qualified personnel only. Opening electrical panels, control boards, or equipment enclosures involves dangerous voltages and should only be performed by licensed pool or electrical technicians. Unauthorized service may void your manufacturer warranty. If unsure, contact a qualified professional.