1990 honda accord 2 dr-4 cyl -the heater will not blow hot air---any thoughts thanks

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 ...

sure.

what is your goal hot air, you never said,

got full fan speed? on high>? sure.
got full engine coolant heat 180F or more holding??? if not all is lost.
if car has a heater core water valve is it open>?
are the 2 heater core water tubes both fully hot,(hand test)
yes> good.
now you need air flow through the core (heater)
that means the damper most be open,, is it?

in that order. (heat)
the dampers on hondas can be complex. (10x on electric damper motors , aka, damper actuators)
see part 5 and 6 here
http://www.hondaautomotiveparts.com/auto/jsp/mws/prddisplay.jsp?inputstate=5&catcgry1=ACCORD&catcgry2=2002&catcgry3=2DR+EX&catcgry4=KA4AT&catcgry5=HEATER+UNIT

the fSM covers the complex tests of dampers, and not having
a real FSM makes this near impossible.
why , because your dampers are no like anyothers on earth.
other cars use different types. and are all unique .
unlike CABLES
unlike vacuum servos.
see>?

here are the basics for heat.
http://www.fixkick.com/AirCond/heater.html

No fan or no heat?

sometimes if the fan blows you still feel the heat from the dash, but no blower to move the hot air, also is the car over heating?
regards
dan

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.

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.

Hello los190uni.
I suspect you have a cabin air filter that is clogged.
In behind your glove box there is a 2 part air filter designed to reduce dust and pollen from coming through.
You need to remove the glove box, the frame around it and the cover for the filters.
They are a bit of a pain to do but not impossible. Honda should have designed it better than they did.
If you have further questions please ask.
Best of the season to you.

KL

Yes clogged heater core may be the answer in your case .

You should have added red died gas to your AC to see where it leaks, then fix the leak, then recharged it properly.

You may have a clogged heater core, leaking heating cores still provide heat.

Even under acceleration you should have cold air from vents.Does the air change from the vents to defroster or elsewhere when accelerating? Make sure you have a full charge of refrigerent..Also make sure the engine isnt running hot...