1993 Honda Civic heater stopped working

HONDAMAN93

MEMBER
1993 HONDA CIVIC
4 CYL
2WD
MANUAL
201,000 MILES

My heater was working just fine untill yesterday all of a sudden it quit working for no reason I checked all of the fuses and they are all fine. I was wondering what it could be. Any advise would be very much appretiated with your feedback thanks

Saturday, December 20th, 2008 AT 8:38 PM

5 Replies

KHLOW2008

MECHANIC
41,814 POSTS

Hi hondaman93,

You mean the air is not blowing?

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Sunday, December 21st, 2008 AT 9:51 AM

HONDAMAN93

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2 POSTS

When I turn on the switch nothing happens no air no noise nothing

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Sunday, December 21st, 2008 AT 5:38 PM

KHLOW2008

MECHANIC
41,814 POSTS

Hi hondaman93,

So the blower fan motor is not working.

We shall start with that first. Start engine and turn on switch. Use your hand to bang the blower motor housing under the dash on passenger side and if fans starts working, the motor is failing and it's time to replace it.

If above fails, hope you have a test lamp and is able to do some wiring test.

With ignition switch ON, test for power supply to the blower motor Blue/White wire by back probing it. If power is available, back probe the other wire, Blue/Black. If power is not available, the motor is bad.

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Monday, December 22nd, 2008 AT 7:44 AM

VICMADRIGAL

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1 POST

Hello, my heater it’s not working, it’s just blowing out cold air.

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Wednesday, December 22nd, 2021 AT 7:27 PM

SQM

MECHANIC
6,383 POSTS

Hello,

There are a number of reasons why the heater might not work and only blow cold air.
It could be due to being low on coolant, having a stuck open thermostat that is not allowing the engine to warm up properly, faulty blend door actuator that is stuck on the cold side, it can also be due to a clog in the heater core which is restricting the flow of coolant through it.

Take a look at this guide, it covers the typical issues:

https://www.2carpros.com/articles/car-heater-not-working

Go through this and let me know what you find or if you have any questions.
Thank you.