Knob Broken Off Timer on Roper Dryer (Model RE) – What Part Fixes It?
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Understanding the Problem
If the control knob on your Roper dryer (model RE) broke off from the timer shaft, the dryer may be hard or impossible to set, or the timer may not advance correctly. Often the knob itself is the only thing damaged and is inexpensive to replace. In other cases the knob-retaining shape on the timer shaft (splines or D-shaft) is stripped or broken, which requires replacing the timer control or using a specific adapter knob. Because Roper dryers share many components with Whirlpool/Maytag, there are common replacement knobs and full-timer assemblies available. The correct fix depends on whether the timer shaft is intact. If the shaft is still solid and the internal timer works, a replacement knob (matched to the shaft type: D-shaft or splined) will restore normal operation. If the shaft is broken, the plastic retainer is damaged, or the timer won’t advance, replace the entire timer assembly.
Common Symptoms
Missing or damaged knob, inability to select cycle, timer not advancing (or advancing irregularly), dryer won’t start or won’t change settings.
Common Causes
- Plastic knob snapped off from normal use or being pulled too hard
- Timer shaft splines or retaining feature stripped/worn so knob no longer grips
- Timer mechanism damaged (shaft broken or internal timer failed) requiring full assembly replacement
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
Pull the console forward (or remove the back panel) and inspect the timer shaft—note if it’s a smooth round shaft, a D-shaped shaft, or a splined shaft. If the shaft shape is intact and the timer advances with a screwdriver, you only need a matching replacement knob.
Frequently Asked Questions
Can I glue the broken knob back on?
A temporary glue fix may hold the knob for light use, but it’s not reliable because knobs take twisting forces and heat. Gluing can fail quickly and may leave debris. Best practice is to replace the knob with a matching part or replace the timer if the shaft is damaged.
How do I know whether to replace just the knob or the entire timer?
Remove the control panel to inspect the timer shaft. If the shaft shape (D or splined) is intact and the timer advances when you turn the shaft with a small screwdriver, a replacement knob will usually fix it. If the shaft is broken flush, stripped, or the timer doesn’t advance, replace the full timer assembly. Always match the replacement part number stamped on your dryer’s timer housing for a proper fit.
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