KitchenAid K5SS Speed Control Plate – What Part Fixes Speed/Knob Problems?
Need the replacement part? Search your model number at for guaranteed fit and fast free shipping.
Understanding the Problem
What the speed control plate is: The speed control plate on a KitchenAid K5SS sits behind the speed selector knob and provides the mechanical interface and detents that allow the knob to select different speed contacts. In many designs it also supports the selector switch assembly. When the plate or its splines/detents fail the mixer may have a loose or slipping speed knob, jump between speeds, not change speed, or run on a single speed. Step-by-step diagnostics and repair (practical how-to): 1) Confirm the symptom: Note whether the knob is physically loose, if the mixer only runs at one speed (usually HIGH), if speeds skip, or if the knob pops out. Also observe any visible cracks in the plastic plate behind the knob. 2) Safety first: Unplug the mixer before any inspection or disassembly. Allow attachments to be removed and the head to cool if recently used. 3) Remove attachments and bowl: Take off the whisk/beaters and bowl so you have clear access to the head and speed knob. 4) Remove the speed control knob: Most KitchenAid knobs simply pull straight off the splined shaft. If there's a set screw, loosen it first. Pull firmly and evenly; use a rag for grip if needed. 5) Inspect the knob and plate: With the knob off, look at the plastic speed control plate and the knob splines. If the plate has broken or worn detents, chipped teeth, or the knob splines are rounded, that’s likely the problem. 6) Access the plate: Depending on model detail, you may need to remove 1–2 small screws or tabs holding the trim ring or cover. Carefully remove any trim to expose the plate and selector switch. Keep track of screws and springs. 7) Check wiring and switch contacts: Visually inspect the selector switch contacts and wiring for burning, corrosion, or loose connectors. A bad contact can mimic a plate problem. 8) Multimeter test (optional): With the unit still unplugged, you can test the selector switch continuity across different positions by gently moving the selector mechanism and probing the switch terminals to confirm the switch changes state. If the switch never changes even when you move the plate, the switch assembly may be faulty. 9) Replace the speed control plate: Remove the screws or clips holding the plate in place, note alignment/orientation and remove the old plate. Fit the new OEM speed control plate in the same orientation, reattach screws/clips, reconnect any harnesses you unplugged. 10) Reinstall knob and trim: Put the knob back on (align splines), tighten set screw if present, and snap or screw the trim back on. 11) Functional test: Plug the mixer in and test each speed briefly with the head unloaded. Confirm detents feel solid and speeds change smoothly. 12) If problem persists: If replacing the plate does not restore full function, the selector switch or internal wiring or the motor control may be failing; consider replacing the full selector/switch assembly or seeking professional repair. Safety note: Always unplug before working inside the mixer. Avoid forcing plastic parts—they can snap and create loose debris. If you’re not comfortable removing internal switches or wiring, stop and consult a trained appliance technician.
Common Symptoms
Loose or slipping speed knob; knob pops off; mixer runs at only one speed or skips speeds; rough/noisy selector detents; visible cracks or worn teeth on the plastic plate behind the knob.
Common Causes
- Worn or stripped splines on the speed knob
- Cracked or broken plastic detents/teeth on the speed control plate
- Loose or broken screws/clips securing the plate
- Faulty selector switch or burned contacts causing similar symptoms
Popular Parts That Fix This Problem
These are the most common replacement parts that fix this problem. When you're ready to order, click below to find the right part at PartsDiscount.com — just search by your appliance model number for a guaranteed fit.
Helpful Repair Tip
To confirm the plate is the issue, remove the knob and manually move the selector mechanism while the mixer is off — if the motor responds inconsistently or the detents feel missing, the plate or the knob splines are worn.
Frequently Asked Questions
How do I know whether to replace the speed control plate or just the knob?
If the splines on the knob are rounded or the knob feels loose but the plate looks intact, try replacing the knob first. If the plate has cracked detents, missing teeth, or the knob pushes onto a damaged spline area, replace the plate (or both). Removing the knob and inspecting both parts is the quickest way to decide.
Can I install the OEM speed control plate myself and how long will it take?
Yes — for a handy homeowner the job is usually straightforward and takes 15–45 minutes: unplug, remove knob and trim, swap the plate, reassemble and test. If you need to access or replace internal wiring or the selector switch, allow more time and only proceed if comfortable with appliance wiring; otherwise contact a technician.
Related How-To Videos
Real DIY Repair Stories
Be the first to share your repair story!
Share Your Repair Story
Your experience helps other homeowners fix their appliances. Tell us how it went!
Can't Fix It Yourself? Find a Local Technician
It's perfectly okay to call a professional. Some repairs require specialized tools, deep teardowns, or dealing with complex systems that are better left to the pros.
Find the Right Part for Your Appliance
Don't guess — search your exact appliance model number at PartsDiscount.com to find the correct OEM compatible replacement part. They offer fast free shipping, guaranteed fit, and thousands of parts in stock.
Your Free Parts Videos
Whether your dishwasher won't drain, your dryer stopped heating, or your fridge isn't cold, we've created simple repair guides for the most common appliance problems homeowners face. Each guide explains what's going wrong, the most likely causes, and which replacement parts fix the issue. When you're ready to order, we link directly to PartsDiscount.com where you can search by model number and get the right part shipped fast.