Blower Wheel (Squirrel Cage)
| What it is | The rotating drum that does the actual work of pulling air off the cooktop. |
|---|---|
| Where it sits | On the motor shaft, a caged drum of curved blades |
| How it fails | Vibration, rattle, a wobble that comes and goes with speed |
| Checked with | Spun by hand with the power off, looking for drag and loose grease |
| Price | Quoted after the $89 visit |
- Fan grille in the side wall
What the drum actually does
Air is not pushed along by the blades the way a propeller pushes it. The drum pulls air in at its open end, flings it outward by rotation and lets the housing collect it and turn it up the duct. That layout is why a hood blower can be compact and still work against a long run, and why an unbalanced drum is felt right through the canopy.
Why it goes out of balance
Grease is the usual culprit. It arrives as vapour, condenses on the blades and builds unevenly, so one side of the drum ends up heavier than the other. The wobble that follows is worse at high speed than at low, which is the pattern owners describe. Harder to fix: a wheel that has slipped on its shaft, a blade knocked out of line, or bearings that have had years of an unbalanced load.
Cleaned, rebalanced or replaced
With the power off the drum is turned by hand: drag points at the bearings, a rough patch of resistance at the housing, and a coating you can feel with a fingertip at grease. A loaded wheel and its housing are cleaned. Damage means a new wheel, and the cost of that follows the $89 visit rather than a guess over the phone.
What putting it right costs
This one has no published band. Wolf Repair Los Angeles puts a figure on it after the diagnosis, as one number covering the part and the labour, and nothing is ordered until you have agreed it — (310) 626-4008.
A flat $89 buys the call-out and a full diagnosis, and that $89 is deducted from the repair once you have approved it.
Follow-ups
Can a blower wheel be cleaned instead of replaced?
Often, yes. If the drum is sound and the imbalance is grease rather than damage, cleaning it and the housing brings the noise back down and costs nothing in parts. What rules it out is a cracked hub, a bent blade or a wheel that has worked loose on the shaft.
Is a rattling hood safe to keep using until someone comes out?
Short cooking sessions, yes, but an out-of-balance wheel wears the motor bearings every hour it runs, and what began as a cleaning job turns into a motor. If the noise is new and getting worse, use the lowest speed that clears the steam and call Wolf Repair Los Angeles on (310) 626-4008.