Fisher & Paykel Oven Code F4: Power Module Problem

What F4 means

On Fisher & Paykel legacy 30-inch wall ovens such as the OS302, OD302, OS301 and OD301, and the OB30DDEPX1, F4 reports a problem in the power module. The display shows F4, and the oven may stop heating or refuse to start. The recommended checks are all connections to the power module and the clock module, and if it recurs the power module is replaced.

Common causes of F4

A loose connection to the power module or clock module
A power module that has failed
A heat or moisture issue on the module
A power disturbance that upset the module

✓ One safe check you can try

1. Turn the oven off at the breaker, wait a minute, and turn it on. 2. Set the clock and try a short bake. 3. If F4 does not return, carry on but watch it. 4. If it repeats, leave the breaker off and call us. Please do not open the oven's control area to check connections yourself.

! Why to stop there

Checking connections to the modules involves working behind live panels.
A recurring F4 usually ends with a replaced power module, so we confirm first.
We explain the findings and quote in writing.
Our work has a 30-day workmanship warranty.

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.

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Other Wall Oven codes

F4F4 questions

What does the power module do?

It switches the oven's heating elements and other loads on command from the clock module. If it has a problem, the oven cannot heat properly.

Why check connections first?

A loose plug between the modules can give the same code as a failed module. Reseating it costs far less, so a technician checks connections before replacing parts.

Can F4 come and go?

Yes. An intermittent connection or a warming module can make it appear only sometimes. Tell us when it shows up, as the pattern guides the diagnosis.