Sta-Rite 42001-0057S transformer for Max-E-Therm SR-200, SR-333 and SR-400 heatersSta-Rite Transformer for Max-E-Therm Heaters, 42001-0057S$7499
Sta-Rite 42001-0057S transformer for Max-E-Therm SR-200, SR-333 and SR-400 heaters
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Sta-Rite Transformer for Max-E-Therm Heaters, 42001-0057S

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$7499
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Quick overview

  • Genuine Sta-Rite A new OEM part, number 42001-0057S.
  • Fits three Max-E-Therm models Listed for the SR-200, SR-333 and SR-400.
  • Powers the control circuit The transformer steps supply voltage down for the heater controls.
  • A dead panel starts here When a heater shows no display and no response, the transformer is one of the first things a tech checks.
  • Direct replacement Swaps for the original transformer in the heater electrical system.
  • Work with the power off Isolate the heater at the breaker before opening the electrical compartment.
Full description and specifications ↓

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Product details

The Sta-Rite 42001-0057S is the replacement transformer for Max-E-Therm pool heaters, listed for the SR-200, SR-333 and SR-400. It is a new OEM part.

What it does

The heater runs its controls on low voltage. The transformer takes the incoming supply and steps it down to feed the control board, the ignition control and the switches around them. When it fails, the heater goes completely quiet: no display, no fan, no response to a call for heat, even though power is present at the unit.

Before replacing it

A dead panel has more than one possible cause, so check for output on the secondary side before condemning the transformer. Isolate the heater at the breaker before opening the electrical compartment.

Specifications
Brand Sta-Rite
Manufacturer part number 42001-0057S
UPC 022315210592
Type Transformer
Fits Sta-Rite Max-E-Therm SR-200, SR-333, SR-400
Condition New OEM part
Shipping weight 2.25 lb
Ships Parcel

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Questions and answers

What people ask about this product, answered by our pool techs.

Which heaters does this transformer fit?
Sta-Rite lists it for the Max-E-Therm SR-200, SR-333 and SR-400.
Is it a genuine Sta-Rite part?
Yes. It is a new OEM part, number 42001-0057S.
What does the transformer do?
It supplies the low voltage the heater control circuit runs on. Without it the controls have no power.
My heater is completely dead, is this the part?
It is a common cause of a heater with no display and no response, but it is not the only one. Confirm the transformer output is missing before replacing it.
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