Bosch Range E302 Warns That the Control Board Is Too Hot

What E302 means

A hot control board is the story behind E302. The module's built-in sensor measured heat above its limit, so oven heating stopped and the cooling fan jumped to full speed. Normal operation returns once the cavity falls to 212 degrees Fahrenheit. A self-clean already underway stays blocked until the control is reset, Bosch notes, since that cycle loads the appliance with more heat than anything else it does.

Common causes of E302

Fan that has stopped or is turning slowly
Ventilation trim that is blocked or damaged
Heating relay stuck on, pushing extra heat into the control area

✓ One safe check you can try

1. Turn the oven off and give the range time to cool. 2. Look at the vent trim above the oven door: it must be clear, undamaged and uncovered; at counter height a towel or tray is enough to block it. 3. Restore power and use the range lightly. 4. If E302 returns, call us rather than running more cycles.

! Why to stop there

Running the oven again before the cause is known keeps stressing a board that just reported overheating.
A stopped fan gives no warning until the board overheats, and a new board will not bring the fan back.
A relay stuck closed is a safety matter, not a home test.

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 Range codes

F93Bosch Range F93 Is the Lock-Side Twin of F90 F94Bosch Range F94: Door Lock Attempts Exhausted F91Bosch Range F91 Means the Unlock Attempts Ran Out F92Bosch Range F92: Oven Believes the Door Is Open E107Bosch Range E107: When the Oven Door Stays Locked E115Bosch Range E115 - Oven Overheated, Door Locked Itself E122Bosch Range E122? Check the Meat Probe First E126Bosch Range E126 and the Latch Switch That Went Silent

E302E302 questions

It recovered on its own; are we done?

It restarted by design once the cavity cooled to 212 degrees Fahrenheit, but whatever overheated the board has not been fixed, so expect a repeat. Mention how often it happens when you call.

Why won't self-clean start afterward?

Bosch blocks it until a control reset is done, because cleaning generates the most heat of any cycle and the board has just shown it struggled.

Can clutter near the oven trigger it?

Yes. A blocked vent trim is one of Bosch's listed causes, so keeping the strip above the door clear is a simple preventive step. Wipe away crumbs and grease there occasionally as well.