Heater blow cold air in my 1994 Honda Accord (4

HONDA EXPERTS accord vents dont switch anymore? ' Yahoo Answers

https://answers.yahoo.com/question/index?qid...Sep 13, 2008 - my 1994 honda accord ex has a problem. the heater vents dont switch ... defroster and feet etc.. none of those work anymore. nether does my AC, ... still no change. they will blow hot and cold air out of the front "in your face" ...

Honda Prelude - A/C delete - YouTube

? 7:41
www.youtube.com/watch?v=41k6UxSUM8Y
Jul 30, 2013 - Uploaded by Nicolas Alvarez
Honda 98 prelude 5th gen A/C delete H22A New belt size = 37 inches (same as 97 accord) ... New belt size = 37 inches (same as 97 accord) ... How to: 1990 Honda Prelude - Diagnosis Air Conditioning Inop and a Vacuum leak ... Fixing A Car Air Conditioner That Blows Hot Air - Duration: 3:42. by Scotty ...

have you checked the air duct bafle plates are operating to divert the airflow?

take the radiator cap off when the engine is cold check the fluid in the radiator,if necessary add fluid to the radiator not the resevoir with the motor running and with the heater on until full leave the cap off untill the motor gets up to full heat and the thermostat is open and pulls the fluid into any unfilled cavities. Add fluid as necessary.

1st you need to make sure no air in your system open you radaiator cap and your heater to max and see if air bubles or circulation is going on fill up accordingly otherwise you have blockage in your system or water pump if no circulation ////make sure no bubles all bubles should be gone////look for coolant circulation in your radiator make sure your thermostat is not defective or placed in the right position.

If it is blowing cold air, check your coolant level. If the level is good, you may have a bad thermostat in the engine. You haven't given enough info for a good diagnosis. Does your temperature gauge come up to normal? Does your heater not work all the time or only under certain conditions?

Sounds like a thermostat or cooling system issue. Change the fluid and the thermostat. It will do your engine good so it's money well spent.

First you have to identify what causes the problem.
To do this you have to:
1) When engine is cold check the level of coolant. If it is low fill it up.
2) Start engine and check if engine reaches regular temperature. If your engine is not heated enough it means your thermostat does not work properly and should be replaced.
3) If engine temperature is normal, then check the temperature of pipes that go to/from heater core. These pipes are located up the fire wall (easier access is from the passenger side). If pipe/pipes are cold (even engine is worm) it means you heater core is plugged and should be flushed. Keep in mind, flushing the whole cooling system is different from flushing heater core.
4) If pipe/pipes are hot/warm, turn off the fan, switch controller to the hot position, wait for 3-4 minutes and turn on the fan. Note if the cold air blows first or warm air blows first but it cools down in 5-10 seconds. If the air blows cold than it is most probably the problem with blend door or blend door actuator.
5) If air blows warm first and then cools down, then while running engine and remaining the transmission in PARKING position, press on the gas pedal until your engine reaches 3,000 RPM. Check if your heater blows warm/hot air. If it does, then your water pump does not work properly and should be replaced. If the air still cold, I would suggest to flush the heater core.

I would check your thermostat. Even replace it if its not that expensive. Hopefully its not a heater core. Good Luck..
Have a tech check it out...

Check your RADIATOR. it probably has a leak or crack or both..Well, i guess if its leaking it must have a crack. This is most probable to your problem affecting the air cold to hot vice versa.

if your not getting any air coming out of the vents then your problem is your blower motor. test the wire harness to see if its getting power,if it is then your blower motor is bad if its not getting power then check your relay.