Overview
Run capacitor, 6 µF, 370 VAC, for the Phoenix AirMax fan motor. Phoenix part number 4035235-03. It replaces 4037221-06.
What it fits
- Phoenix AirMax — named in the 50 Hz service parts list as Run Capacitor, 6 mfd, 370 VAC
Important — the 4035235 family has several values
Phoenix use the same base part number with different suffixes for different capacitance values, and they are not interchangeable:
- 4035235-03 — 6 µF, 370 VAC — AirMax fan motor (this part)
- 4035235-01 — 4 µF, 370 V — 250MAX impeller
- 4035235-09 — R150 impeller
Read the value printed on the capacitor you are removing. The suffix is the specification, and ordering by base number alone will get you the wrong part.
Symptoms of a failed fan capacitor
- Motor hums but the impeller does not turn
- Impeller starts only if you help it by hand — a classic dead-capacitor symptom, and a good reason to stop and unplug the machine rather than keep doing it
- Motor runs hot, or noticeably down on airflow
- Machine trips a breaker on start-up
A bulged, split or weeping capacitor is finished on sight. One that looks fine can still be well below value — test it rather than judging by appearance.
Safety
Capacitors hold a charge after the machine is unplugged. Discharge it safely before handling.
Photograph the terminal connections before you disconnect anything.
Related parts
Other AirMax service parts from the same list:
- 4036575 — impeller assembly
- 4035665 — rubber feet
- 4035825 — rocker switch
- 4037469 — inlet grill
- 4024936 — lay-flat duct, 14" × 250' (optional)
Only the duct is currently a stocked CCW line — ask us about the others.
Frequently asked questions
Does it replace 4037221-06?
Yes — that is stated in CCW's record for this part.
Can I fit a 4 µF or a 3 µF instead?
No. Match the value.
Can I fit a higher voltage rating?
A higher voltage rating is generally acceptable where a capacitor physically fits; a lower one is not. Ask us if you are unsure — do not guess on a motor circuit.
Which machines take it?
The Phoenix AirMax. Other Phoenix machines use different values from the same family.
Read the µF value off your existing capacitor and send it to us with the machine model — we will confirm the right one before you order.
