GE Zenith® Automatic Transfer Switch Controls Repair Service
Please contact us for a price quote and estimated turn-around-time. Turn-around-time may vary depending on current in-house workload. Repairs come backed with a one year warranty covering parts and our labor.

This is a full board rebuilding service – we'll check every input and output for proper operation, repair or replace those parts which don't measure up, and add surge suppression to the microprocessor (something the original design lacks). This helps prevent future failures due to surges and lightning strikes.
HOW IT WORKS
- Step 1 - Fill out and print our shipping label.
- Step 2 - Ship your regulator or control board to us.
- Step 3 - You will be contacted when your repairs have been completed and to arrange payment and return shipping.
NOTES
- Rebuilding service for MX50, MX60, MX100, MX150, MX200, and MX250 controls
- Repairs and upgrades for defective, obsolete, out of production, or current Zenith and GE Zenith single and 3 phase low voltage automatic transfer switch microprocessor controls.
- TEST ONLY - There is a test fee of $35(slightly higher for complex ATS controls). Boards received that test as "NTF" (No Trouble Found) are charged this fee.
- Factory Direct Prices Shown - RE-SELLERS (Gen Set, Marine & RV Dealers/Distributors/Repair Shops) call for your Discounted Pricing!
- "P" = PLUS PARTS. Required components over $10 each are extra charge, will be itemized on the invoice. Other required components and material are included in the rebuild price at no extra charge.
Repairable Part Numbers
Scroll down for more part numbers
OEM Part # | Description | Factory Direct Rebuild Price | |
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MX50 |
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50P-2000 | Control Board | $275 | |
50P-2006 | Control Board | $275 | |
50P-2008 | Control Board | $275 | |
50P-2012 | Control Board | $350 | |
50P-2013 | Control Board | $350 | |
50P-2014 | Control Board | $350 | |
Individual 3-phase Transformer Boards | $75 | ||
Older Control/Display Panel (with discrete components) | $85 | ||
MX60 |
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50P-3000 | Control Board | $275 | |
50P-3001 | Control Board | $275 | |
50P-3002 | Control Board | $275 | |
50P-3003 | Control Board | $275 | |
50P-3031 | Control Board | $350 | |
50P-3032 | Control Board | $350 | |
50P-3033 | Control Board | $350 | |
Individual 3-phase Transformer Boards | $75 | ||
MX100A major problem with MX100 units are that the push-button switches are mounted improperly in the front membrane panel. This can cause erratic operation. Please send the front panel along with control for repair and we'll adjust the spacing for perfect operation. |
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50P-1044 | Control Board | $350 | |
50P-1053 | Control Board | $350 Defective pots are replaced with upgraded units for significantly increased reliability | |
Optional 50P-1053 pot repair service | $400 All pots are replaced with upgraded units | ||
50P1093 | Control Board | $350 | |
And many variants | |||
MX150The common failures are loss of sensing on the utility input and microprocessor lock-ups. The microprocessor lock-up is caused by poor ground connections between the transfer switch and the control board. Once the grounding problem is corrected, unplug the MX150 for a minute then plug it back in and it will return to normal operation. |
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50P-1138 | Control Board | $350 plus display if needed | |
50P-1158 | Control Board | $350 | |
And many variants | |||
NEW! | Now offered are replacement membranes! They can be sent as a kit if needed or send us your Control and we will replace it for a worry free fit. | Call 717-590-7330, ask for Troy | |
MX250 |
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All variants | $350 |