Error code · Microwave

Code 4d52 in a Whirlpool Built-In Microwave: Door Switch Condition

Medium · inspection needed

Code: 4d52
Appliance: Microwave
Brand: Whirlpool
Warranty: 30-day workmanship

What 4d52 means

On Whirlpool built-in microwaves and microwave drawers, for example the WMC50522AS, 4d52 appears when the oven door latch assembly, the door switch, or the wiring associated with them reports a problem. The oven has to confirm the door state before heating, so the code usually comes with a unit that will not start or ends its cycle early. The display holds the code until the condition is gone.

Common causes of 4d52

Door switch not signaling the door state correctly
Latch assembly misaligned or worn
Connector or wire along the latch circuit
Temporary condition cleared with a power cycle

✓ One safe check you can try

1. Open the door, then close it fully until it latches. 2. Turn the breaker for the microwave off and wait a minute. 3. Switch it on. 4. Keep an eye on the oven for one minute for any sign of 4d52. 5. Test with a short cooking cycle.

! Why to stop there

Repeated 4d52 points us toward a physical test of the latch and switch contacts
We look at door alignment and wiring at the same visit
We quote in writing before work and warrant workmanship for 30 days

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 codes

F8E5Whirlpool Microwave Code F8E5: Exhaust Air Temperature Sensor PUSH or PSHWhirlpool Built-in Microwave Shows PUSH or PSH: Press Start F9Whirlpool OTR Microwave Error F9: Control and Relay Boards Registration ErrorWhirlpool Over-the-range Microwave "Registration Error": Network Checks F9 or F9E0Whirlpool Built-in Microwave Codes F9 and F9E0: Home Power Supply Sabbath, Sab, 5Ab, or 5A6Whirlpool Built-in Microwave Showing Sab or 5Ab: Sabbath Mode F9QWhirlpool Over-the-range Microwave with F9Q on the Display: Power Reset Code SEWhirlpool Over-the-range Microwave Error SE: Keypad Circuit

4d524d52 questions

My microwave drawer shows 4d52 but closes fine. What now?

Close it fully, then do the one-minute breaker reset and watch the oven for a minute. If the code returns, the latch assembly, switch or wiring needs a test, and we handle that with the unit disconnected from power.

Could a bent or loose door cause this?

A door that does not seat squarely can miss the switch. We check the alignment and the switch contacts, then the wiring, before suggesting parts.

Do you repair this on older units too?

Yes. Many older built-ins are still in homes across Houston, and the latch and switch parts are usually serviceable. We tell you plainly when a repair is not worth it.

Book a visit

Still seeing 4d52?

A technician diagnoses it on site and gives you the price in writing before any work starts.

(713) 589-6107