Transformer 120v-pri 24v-sec 40va
Grid is 1 inch square
  Transformer S1-2940A3541
  Transformer S1-2940A3541
  Transformer S1-2940A3541
Manufacturer Part

Transformer S1-2940A3541

Genuine OEM Part # S1-2940A3541RC Item # 2340406Alternative Part Number(s)
Manufacturer Part
Transformer 120v-pri 24v-sec 40va
Grid is 1 inch square
  Transformer S1-2940A3541
  Transformer S1-2940A3541
  Transformer S1-2940A3541
$101.25
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Estimated DIY Savings: $297.47
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Transformer 120v-pri 24v-sec 40va
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$101.25
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This part S1-2940A3541 is compatible with:

Product Type:
Central Air Conditioner, Furnace
Brands:
York, Coleman, Luxaire

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Transformer Customer Reviews

Common Problems Fixed by the Transformer

Based on customer reports and repair data, this part commonly fixes these issues:

About the Transformer

The furnace control board sends a low voltage signal of 24 volts to the thermostat. When the themostat cooling contacts close, a 24 volt signal is sent to the contactor coil, closing the high voltage circuit and sending power to the condensing unit components. Some furnaces have a separate transformer for the 24 volt circuit, so if the contactor is not receiving the proper voltage when the thermostat cooling contacts are closed, it's likely this transformer has failed and the component will need to be replaced.

Alternative Part Number(s)

Replaces Part Number S1-2940-354P
Replaces Part Number S1-4045-1131
Replaces Part Number S1-7680-3501
Replaces Part Number S1-7707-3501
Replaces Part Number S1-2940-3541
Replaces Part Number S1-4048A2241
Replaces Part Number S1-7680A3501
Replaces Part Number S1-2940-354
Replaces Part Number S1-4048-2241
Replaces Part Number S1-7660C3501
Replaces Part Number S1-02634032000
Replaces Part Number S1-7660-3501
Replaces Part Number S1-02634729000