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Blower fan for heater not woking?

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi ron murray,

Quite often it is the motor that is faulty. At the blower motor test for power supply and if available. Ground the other wire, the fan should work, if not it is defective.
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Tuesday, December 1st, 2020 AT 1:02 PM (Merged)
Tiny
SKYEMAN1
  • MEMBER
  • 2 POSTS
  • 1990 HONDA ACCORD
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 262,000 MILES
After running the interior fan on full with the air conditioner on (very hot all this week in LA), I started out yesterday with the car cold, but the (interior) AC fan didn't come on. All panel lights are fine. I'm pretty sure the radiator fan came on last night after driving (windows open for cooling!) The whole day.

I check all under-hood and interior fuses. They seem fine. The only thing I couldn't check is the "Cooling Fan Relay". Is that for the radiator fan?

What else could be the problem?
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Tuesday, December 1st, 2020 AT 1:02 PM (Merged)
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Yes that relay is for the cooling fan not the blower.
Check the fuse first, then find the motor under dash pass. Side. Get a test light check for voltage at the connector. If present then motor is defective. If no voltage maybe blower resistors or the control switch. Good luck
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Tuesday, December 1st, 2020 AT 1:02 PM (Merged)
Tiny
SKYEMAN1
  • MEMBER
  • 2 POSTS
Thank you. The fuse checks out visually and I temporarily swapped it with another (40 A instead of 30 A) fuse -- fan didn't budge.

How do I recognize the blower motor on the passenger side engine compartment? Under the fuse box?
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Tuesday, December 1st, 2020 AT 1:02 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi skyeman1,

The blower motor is the outer most housing under the passenger dash. With blower motor on at highest speed, give the motor some knocks and if it works, replace it, the carbons are running short.

If not, check for power supply to one of the 2 point socket with ignition switch on.

If no supply, the blower relay is not getting power through from under bonnet fuse box. Check for loose connection under the fuse box if relays and fuses are ok.
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Tuesday, December 1st, 2020 AT 1:02 PM (Merged)
Tiny
TONYGOLATO
  • MEMBER
  • 1 POST
  • 1988 HONDA ACCORD
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 136,000 MILES
My blower for the heater/AC stopped working in all speeds. Can you assist?
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Tuesday, December 1st, 2020 AT 1:02 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Apply power at the blower motor blue and white wire direct from the battery positive post-if the blower comes On -test the blower motor resistor and blower switch.
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Tuesday, December 1st, 2020 AT 1:02 PM (Merged)
Tiny
DAWNIONE
  • MEMBER
  • 4 POSTS
  • 1999 HONDA ACCORD
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 145,000 MILES
Today, I was driving with my A/C on and all the sudden the A/C seemed to just stop working; no air, warm or cold. Although the digital indicator was showing the AC was on. Still no air was blowing out. I fear the worse, especially since I live in South Florida an dthe summer months are just around the corner.
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Thursday, December 17th, 2020 AT 12:50 PM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Have you tested all the fuses yet?
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Thursday, December 17th, 2020 AT 12:50 PM (Merged)
Tiny
DAWNIONE
  • MEMBER
  • 4 POSTS
I have not checked the fuses yet. However, I have something new to report on my A/C that you may change things. I found out that air will blow if I place the air controller to blow on the highest setting. This is the only time the air will blow, but it is not cold air. Should I still be checking the fuses or is there something else to suggest?
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Thursday, December 17th, 2020 AT 12:50 PM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
You may have more than one problem. The blower speed issue sounds like a bad blower speed resister which is located in the blower housing under the dash on the passenger side, right next to the blower motor.
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Thursday, December 17th, 2020 AT 12:50 PM (Merged)
Tiny
DAWNIONE
  • MEMBER
  • 4 POSTS
Is this something that can be replaced by myself or are there special tools required to replace the blower resister? If so, is this a pricey repair?
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Thursday, December 17th, 2020 AT 12:50 PM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
No special tools needed, just a spine like Gumby to get into position to reach it
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Thursday, December 17th, 2020 AT 12:50 PM (Merged)
Tiny
DAWNIONE
  • MEMBER
  • 4 POSTS
Thank you for this information, it was very helpful. I will try to replace it myself. Fingers crossed!
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Thursday, December 17th, 2020 AT 12:50 PM (Merged)

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