ACP Amana Oven Error Code M-2: Magnetron 2 Low Current (AXP20)
M-2 on an older Amana Xpress AXP20 or MXP20 oven means magnetron 2 draws low amps, the same kind of reading as M-1 but for the second magnetron. The oven heats more slowly and may stop programs that need full power. Pull the plug, let it cool, wipe the filter and note cooking times for the call.
Medium: one magnetron is weak, so the oven runs slower but can wait for a scheduled service.
- Code
- M-2
- Maker
- ACP Amana
- Equipment
- High-speed ovens
- Applies to
- AXP20 / MXP20 (earlier AXP; listed in the AXP20 error table)
What does ACP Amana error code M-2 mean?
M-2 is the second magnetron's version of M-1. The control measures the current each magnetron draws, and M-2 appears when magnetron 2 draws low amps. The technician runs the service test on magnetron 2 to confirm. The oven heats more slowly and may stop programs that need full microwave power. The manual's list names a weak magnetron 2 that draws too little current, a transformer or diode that feeds magnetron 2 poorly, a loose or burned connector on the magnetron 2 wiring, and a current sense circuit that misreads the magnetron 2 draw. The owner steps are to pull the plug and let the oven cool, wipe the filter, clear the vents and note whether cooking times have grown. Magnetron 2 is the one flagged, so a service test on it, rather than on both, is the efficient way to confirm. The microwave parts hold a charge, so the oven stays sealed. Writing down how much longer food now takes gives a technician a useful baseline.
Affected models and control systems
This applies to the older Amana Xpress AXP20 and MXP20 touch pad combination ovens, as listed in the ACP Commercial Service and Training Manual's AXP20 error table. M-1 names the first magnetron, and M-0 is the general entry.
Code numbers and their meaning can change between control generations. We match the full model and control before acting on a code.
What you may notice
- M-2 on the display
- Food takes longer to heat
- Some programs stop early
- The oven otherwise runs normally
Possible causes
Listed in ACP Amana's documentation
- Magnetron 2 weak and drawing too little current
- Transformer or diode feeding magnetron 2 poorly
- Magnetron 2 wiring connector loose or burned
- Current sense circuit misreading the magnetron 2 draw
Other likely causes — what usually sits behind error code M-2 on this control. A technician confirms which one it is before any part is replaced.
- A magnetron 2 feed diode that has weakened and passes less current than its partner
- A loose terminal on the magnetron 2 wiring that heats and loses contact during long cooking runs
Safe checks before calling for service
- Pull the plug and let the oven cool.
- Wipe the filter and clear the vents.
- Note whether cooking times have grown.
- Keep the oven sealed; the microwave parts hold a charge.
- Tell us how much longer a standard item now takes.
How a technician diagnoses error code M-2
- Read the code and confirm cooking times have grown.
- Run the service test on magnetron 2.
- Compare the draw with magnetron 1.
- Check the transformer, diode and connector for magnetron 2.
- Replace the magnetron or feed part that fails, then retest.
- The magnetrons hold a charge even when the oven is unplugged.
- Comparing the two magnetrons needs the service test, which a technician runs.
- A loose terminal can look like a weak magnetron, so each part must be tested.
How error code M-2 differs from similar codes
M-1 reports magnetron 1 on the same oven, and M-0 is the general low-current entry. M-2 is specific to magnetron 2.
Technical reference
- Document
- ACP Commercial Service and Training Manual
- Edition
- December 2011, 16400012
- Models / control
- AXP20 / MXP20 (earlier AXP; listed in the AXP20 error table)
- Section
- Display Diagnostics - Error Codes: AXP20/MXP20 (hyphenated codes, M-0 to M-2) printed p. 58 (PDF p. 65); AXP22/MXP22 printed p. 74 (PDF p. 81)
- Checked
- October 2026
We use the maker's document to read the code and do not reproduce it. Always confirm the complete model and control before applying these steps.
Related ACP Amana high-speed oven error codes
Is M-2 the same as M-1?
It is the same kind of reading for the other magnetron.
Can I keep using the oven?
It will run slower and may stop some programs. We would not rely on it for full-power work.
Why do you ask about cooking times?
They show how much power has been lost, which helps decide how soon service is needed.
Need help with ACP Amana error code M-2?
A technician confirms the cause on site and gives you the price in writing before any work starts.