ACP Amana Oven Error Code H-1: Incorrect Set Point (AXP20)
H-1 on an older Amana Xpress AXP20 or MXP20 oven means the main board reports a set point that is incorrect. Unplugging the oven and plugging it back in often clears it. If the setting stays wrong, the board needs service.
Medium: the oven stops on a wrong stored setting, and a restart often clears it.
- Code
- H-1
- Maker
- ACP Amana
- Equipment
- High-speed ovens
- Applies to
- AXP20 / MXP20 (hyphenated codes)
What does ACP Amana error code H-1 mean?
The control checks the temperature setting it is working to against what it expects. H-1 appears when the main board reports a set point that is incorrect, meaning the number held in memory does not match what the oven should be doing. A glitch or corrupted setting can cause that mismatch, which is why unplugging the oven and plugging it back in often clears it. The manual lists a set point corrupted in the AXP20 main board memory, a power glitch that scrambled the stored temperature setting, a main board memory problem that holds the wrong value, and a recent setting change that left the set point mismatched. The owner steps are to pull the plug and push it back in, select the program again and see whether the set temperature matches what you chose, and make sure the breaker is on. If H-1 returns, leave the oven off and call us. The board holding the setting is inside the body, next to high voltage parts, so it is not a part to open.
Affected models and control systems
This applies to the older Amana Xpress AXP20 and MXP20 touch pad combination ovens, which use hyphenated codes, as described in the ACP Commercial Service and Training Manual. The AXP22 and MXP22 write this reading H1.
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
- H-1 on the display
- The set temperature does not match what you chose
- The oven refuses to start the program
- The code appears after a power flicker
Possible causes
Listed in ACP Amana's documentation
- Set point corrupted in the AXP20 main board memory
- Power glitch that scrambled the stored temperature setting
- Main board memory holding the wrong value
- Recent setting change leaving the set point mismatched
Other likely causes — what usually sits behind error code H-1 on this control. A technician confirms which one it is before any part is replaced.
- A brownout in the kitchen that interrupted a memory write and left the stored value wrong
- A memory chip on the main board that no longer holds a value when power is removed
Safe checks before calling for service
- Pull the plug and push it back in.
- Select the program again and see whether the set temperature matches what you chose.
- Make sure the breaker is on.
- If H-1 returns, leave the oven off and call us.
- Tell us whether the lights flickered before it appeared.
How a technician diagnoses error code H-1
- Read the code and note whether it follows a power event.
- Check the supply at the outlet.
- Reload the program set points and test whether they hold after a power cycle.
- Test the main board memory.
- Replace the main board only if the set point will not hold.
- The board holding the setting sits next to high voltage and must not be opened by an operator.
- A set point that will not hold means the board's memory is failing, which only testing confirms.
- A power quality problem has to be found or the code returns.
How error code H-1 differs from similar codes
H-0 on the same oven is a missing signal at J1. H-1 is the incorrect set point entry.
Technical reference
- Document
- ACP Commercial Service and Training Manual
- Edition
- December 2011, 16400012
- Models / control
- AXP20 / MXP20 (hyphenated codes)
- 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
Did my program change?
Possibly. The stored set point may be corrupted, so choose the program again and check.
Will it come back?
If a power glitch caused it, it may not. If it returns, the board memory needs a look.
Is it safe to cook with a wrong set point?
No. If the set temperature disagrees with your choice, leave the oven off.
Need help with ACP Amana error code H-1?
A technician confirms the cause on site and gives you the price in writing before any work starts.