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One of the ceiling fans at home was spinning in the opposite direction (clock-wise) and so was sucking up the air rather than blowing it. I live in a hot climate so we always have the fans spinning in the counter-clockwise direction all year round. I need some guidance on safely correcting the direction of this fan. It's been 8 yrs since I last studied Electrical maintenance and honestly do not recall the wiring diagram.. :)


  • Below is an image of the wiring of another fan that correctly spins in the counter-clockwise direction:

Spins correctly in the counter-clockwise direction

Observations:

  1. Input power supply: Yellow wires to the right
  2. Capacitor: White wires on the left
  3. Black: ?, Red: ?, Blue: ?

  • Below is the wiring of the fan that spins in the clockwise direction:

Spins in the clockwise direction, I need it to spin in the counter-clockwise direction

a. Observations:

  1. Input power supply: Indicated on the right
  2. Capacitor: White wires on the left
  3. Black: ?, Red: ?, Yellow: ?

[UPDATE]

b. Observations:

  1. Swapped the red with Yellow.
  2. Fan remains stationary.
  3. Fan will start to move at constant speed in the direction I apply force in.

Product: Crompton Greaves Ceiling Fan - 220/240 V 50 Hz A.C.. SWEEP 1200mm (No lamp).

Wiring diagram: Could not locate the same. Kindly share any wiring diagrams that could help me better understand the same, Thanks..!

Kindly note: This is an Indian fan and the color codes are different from the US standard.

Color Codes: Phase: Red/Yellow/Blue, Neutral: Black, Ground: Green.

I tried checking with the manufacturer on this, but haven't received a response.. Not all single phase AC motors can reverse direction. [1][2]

Latest updates: We finally got a new fan and the old one was sold to scrap.. So while I am no longer able to test your solutions, I definitely look forward to technical explanation of the problem and possible solution(s). Thanks!

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On all of the fans I've seen, there's a switch to reverse the direction for you: delmarfans.com/educate/basics/… –  Andrew Bonnell Nov 17 '13 at 15:07
    
Hi @AndrewBonnell - in India at least, I have never come across a fan that reverses direction :) .. and all articles online only talk about the reversible direction fan. –  Kent Pawar Nov 17 '13 at 15:24
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Must be a quirk, which I suppose makes sense as the fan reversal feature only really makes sense in climates with both heating and cooling climate control. If you post a model number, someone may be better able to help you out. –  Andrew Bonnell Nov 17 '13 at 15:34
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Changing the rotation direction of an AC motor requires the internal motor wiring to be changed. –  Tester101 Nov 17 '13 at 19:24
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4 Answers 4

Ceiling fans either have a switch to change the direction, or a sequence to change it. If there is no switch.

  • Set the fan to the slowest setting.
  • Turn the fan on, off, then back on quickly.

When the fan comes back on, it should come on in the opposite direction.

switching sequences may vary from manufacturer to manufacturer. Consult the owners manual for proper sequence.

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Hi @Tester101, Thank you for your answer. Above steps didn't work for me.. Waiting for a reply from the manufacturer as they didn't seem to provide a wiring diagram on their site. –  Kent Pawar Nov 17 '13 at 19:38
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This is what I'd do:

  1. Leave the terminal of the capacitor which is connected to the supply as it is.

  2. The other terminal is connected to one end of the winding. This needs to be disconnected and connected to the other end of the winding.

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Swap the YELLOW with the BLACK wire and the fan rotation should reverse.

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We're looking for long answers that provide some explanation and context. Don't just give a one-line answer; explain why your answer is right, ideally with citations. Answers that don't include explanations may be removed.

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Please explain why –  Niall C. Feb 28 at 14:56
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Hey! Hey!... Hold on there, every1 here has been giving vague answers2 a seemingly simple issue. Look, Lets get1 thing straight ok! Fans either ceiling or the table top varieties are designed2 primarily do 1thing . That is 2 blow air towards you, below a ceiling fan& in front of a table fan Right? Right! Now getting 2the issue itself if the fans in question turn in the opposite direction then they are bound 2do the opposite , that is they will blow air in2 the "other direction" . So far so good,Now Get his funda straight2! No Matter which side a motor turns , IT IS THE ANGLE OF THE PITCH OF THE PROPELLER THAT DECIDES WHICH WAY THE AIR IS SUPPOSED2 BLOW. Now if u observe the vast majority of the most common &popular products available in the market, then u will observe that the blades that r there on a c/ f will have blades that will have its "leading edge" above the horizontal plane & the "trailing edge " is below the horizontal plane when viewed from the "outer end". thae same goes4the t/f2 except that both the pitch and he rotation will be opposite of this. Is this all clear2 all of u? Now as far as reversing a fan motor is concerned, this depends 2 a large ex on the type of motors used in them. I can tell u this that by & large the motors in both cases appear2b the same here in India. so the there should b the same elsewhere2. Except that v do not find many sporting a reversing switch on them. Even if this is accounted for , i will tell u what happens here and what should happen elsewhere. There r2 winding's in a typical motor. A starting winding and a running winding. And then there is also a capacitor which is connected 2 the starting winding. the other winding is connected across the supply leads whereas the other winding is connected in series and then across the supply.(making both the winding's in parallel if it wasn,t for the cap in series.) the starting winding is a bit less than the running winding, Now for the running ...when the motor is switched on the starting winding exercises a initial starting jerk in the rotor assembly, the other winding is used 2 sustain the starting impulse and will then be primarily used 2 run the motor. Now there r several factors that decide which direction such a motor is supposed2 turn in. Primary factors are the direction of the core assembly as well as the phase of the windings. It is out of scope2 pursue this matter rather than the core issue. The most simple way2 do it is to disconnect the start winding&turn the fan initially in the opp dir…the running winding will then power the motor in the opp dir. Or if u r really tech savvy and adventurous& know what u r really doing then invert the start winding, what this does is it jerks the rotor on2 the opp direction resulting in the fan continuing to run in the opp direction. A change over s/w essentially does the same and has he convenience of being able2 do this off the fly as well. Now a final observation while this is not an elegant solution don’t worry2much abt it.Just don’t get carried away and mix up the starting as well as the running windings. While u may get the job done, a fire hazard aside u may not notice the fan running many shades hotter. So there u have I have tried2b brief afap but ….ladies n g/m..may I nw proudly present2u a revoluti Take care n hv a nice day...Prashanth58in@rediffmail.com

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Hi @user20222, Welcome to Home Improvement @ StackExchange network. Your post needs to be edited to meet the standards set by SE; kindly do read the Help section. Else it would attract down-votes. Thanks! –  Kent Pawar Mar 2 at 19:26
    
Do read the post and the comments - some fans can switch direction. But the fan in question is a one direction fan. Also since when did "2" become a substitute for "to" ..? Sorry, but with all these substitutions your post is very hard to understand... :/ –  Kent Pawar Mar 2 at 19:47
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