Pentair 476223 Ignition Control Module with Flame Sense — MasterTemp & Max-E-Thermostat, Replaces 42001-0052S — Genuine OEM
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The Pentair 476223 Ignition Control Module is the genuine OEM ignition control with flame sense for MasterTemp and Sta-Rite Max-E-Therm pool and spa heaters. It supersedes part 42001-0052S. The module is microprocessor-based, runs on 24 VAC from the heater transformer, and continuously monitors and controls burner operation.
Key Features
- Genuine Pentair OEM: Direct-fit replacement, factory-aligned — no reconfiguration needed.
- Flame sense included: Monitors combustion continuously through the heater cycle.
- Microprocessor controlled: Operates on 24 VAC, safely managing the full ignition sequence.
- Supersedes 42001-0052S: The current part number for that legacy module.
- Wide compatibility: Fits the full MasterTemp and Max-E-Therm ranges.
- Weather-tolerant build: Handles the heat, moisture and outdoor exposure typical of heater installations.
Specifications
- Part Number: 476223
- Supersedes: 42001-0052S
- Cross-reference: Fenwal 35-662944-013, 6290-120, 604012, 47-102-1307
- Type: Ignition control module with flame sense
- Supply: 24 VAC from heater transformer
- Dimensions: Approx. 5.5" L x 4.25" W x 1.625" D
- Weight: 2 lbs
- UPC: 788379888237
- Brand: Pentair (Genuine OEM)
Which Heaters It Fits
- MasterTemp natural gas: 175NA (460792), 200NA (460730), 250NA (460732), 250HD (460806), 300NA (460734), 400NA (460736), 400HD (460805)
- MasterTemp propane: 175LP (460793), 200LP (460731), 250LP (460733), 300LP (460735), 400LP (460737)
- MasterTemp 125 above ground: 125NA (461058, 461059), 125LP (461060, 461061)
- Sta-Rite Max-E-Therm: SR200NA, SR200HD, SR200LP, SR333NA, SR333HD, SR333LP, SR400NA, SR400HD, SR400LP
Frequently Asked Questions
Is this the same as 42001-0052S?
Yes. The 476223 is the current part number and replaces the discontinued 42001-0052S.
What symptoms point to a failed ignition control module?
Ignition failure codes, flame-sense errors, or a burner that will not start consistently — once gas supply, the ignitor and the flame sensor probe have been checked.
Should I replace anything alongside it?
Worth inspecting the ignitor and flame sensor probe at the same time, since a fault in either can present the same way.
Can I install it myself?
This should be fitted by a qualified heater technician. It controls gas ignition and flame safety, and correct wiring is essential.
Can this part be returned?
No. For safety reasons, ignition control modules cannot be returned once installed. Please confirm your heater model and serial number before ordering.
Frequently asked questions
How do I size a pool heater?
Heater sizing follows pool surface area, the temperature rise you want and how exposed the pool is to wind. A larger BTU rating heats faster and cycles less; an undersized heater runs continuously and still struggles on cold nights. Gas heaters also need a gas line and meter capacity that can supply their rated input.
What is the part number for this heater component?
Pentair lists this heater component under part number 476223. Quote 476223 when you cross-reference against your equipment manual, an existing part, or a parts diagram, so you are comparing the same revision.
What routine maintenance does a pool heater need?
Keep water chemistry balanced, because low pH and high calcium hardness are the two most common causes of premature heat exchanger failure. Beyond that: keep the cabinet clear of debris, check for rodent nests before each season, and have the burner and gas train inspected periodically.
How do I confirm this fits my equipment?
Match the part number stamped on the component you are replacing, or look it up in the parts list for your Pentair equipment. If your model or serial number is not named on this page, send it to us before you order and we will confirm the fit.
Is this the complete heater or a replacement part?
Check the title and the specification section above. Heater listings and heater component listings share the same part-number format, so confirm whether you are buying a full appliance or a single serviceable component before ordering.
Is there a warranty on this heater component?
It carries the standard Pentair manufacturer warranty. The terms are set by Pentair, and on some equipment the coverage only applies when a licensed professional performs the installation. Keep the receipt and packaging until you have confirmed correct operation.