I have a 94 civic hatch swap with b18a1 boosted ,but my heat hasnt working since i got the car and its geting very cold 25-30 everynight ,and iv been trying to fix the heat for 2 weeks .

i flushed the whole system and water runs through the heater core fine no leaks thermo was changed about 4 months ago when the car started overheating because the fan went out ,so i staright wired the fan and replaced the thermo .and still no heat the bottow radiator hose dosnt get hot so i thought maybe its because the fans always on so i unhooked the fan and let it run for awhile and got worried because the temp gauge stays at 1/4 and it didnt move from there so i drove it down the road with the fan off still didnt move ,come back home and the bottow radiator hose with alittle warm but still cold .

Please help i dont know whats going on iv tryied everything thanks alot

 

Are you fully bleeding the coolant system?

 

im not sure iv tried leaving the radiator cap of iv done that for about 20 mins but the bottom radiator hose still stays cold and top is hot as can be but car dosnt overheat temp stays at 1/4 .

 

Are both heater hoses hot? If not make sure your heater control valve is open (back of the fire wall)




Also check your heater control valve under the dash to see if its moving when you put it to heat (under dash)

 

Here is how to bleed properly

 

yes iv replaed the heater control valve its set to open and the control on the bottom inside the car is set open and my fan runs all the time i think it might be some of my problem but i dont know how to wire it back stockk was like that when i bought the car

 

and iv bleed the system just like that but i still think theres some air in there or something

 

Someone please help its so cold today

 

If you haven't fixed this in a month's time you need to just take it to a shop.