Fisher & Paykel Speed Oven Alert A5: Microwave System Overheated

What A5 means

On Fisher & Paykel OM24 and OM30 combination microwave speed ovens, such as the OM24NDTDX1, OM30NDTDX1 and OM24NMTNB1, A5 means the microwave system has overheated. The display shows A5 and the microwave function stops. Allow the oven to cool, then power it down before turning it back on. It points to the microwave part of the oven rather than the whole cavity.

Common causes of A5

Running the microwave for a long time with little food inside
Blocked airflow around the microwave system
A cooling fan for the microwave that is not running
A microwave part that overheats under load

✓ One safe check you can try

1. Turn the oven off, keep the door closed, and let it cool for an hour. 2. Power it down at the breaker for a minute and turn it back on. 3. Check that nothing blocks the vents and that the cabinet has room around the oven. 4. Try a short microwave run with a cup of water. 5. If A5 returns, stop and call us.

! Why to stop there

The microwave system works with high voltage and should only be opened by a technician.
Frequent overheating signals a cooling or part problem that a reset will not cure.
We explain what we find and quote in writing first.
A 30-day workmanship warranty covers the work.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

→Same appliance

Other Microwave & Speed Oven codes

A1Fisher & Paykel Speed Oven Alert A1: Oven Has Overheated

A5A5 questions

Can an empty cavity cause A5?

Running a microwave with little or nothing to absorb the energy stresses the system and can trigger overheating. Never run it empty, and keep a cup of water inside for tests.

Will convection cooking still work?

Possibly, since A5 refers to the microwave system. Check the display after cooling. If the oven allows convection, you can use it, but have the microwave looked at.

Is it safe to open the microwave section?

No. It holds dangerous stored voltage even when unplugged. Please leave every panel closed and let us handle the inspection. The part holds charge that can injure you.