My 93 civic dx heater don't work I checked the thing on the firewall to see if it opens and close and it works fine

I pulled the hose off and stuck a flat head in their to see if it's clog from the valve on the firewall and it seems ok .

Just blow air any idea what can be wrong ?
It's too cold to drive around. Without heat lol.

 

Check for low coolant in the reservoir and radiator.

Does the engine take a long time to warm up?

 

Might be a clogged heater core as well, just a few postings they posted a video on how to clear it.

https://honda-tech.com/forums/honda-civic-del-sol-1992-2000-1/92-hatch-z6-no-heat-question-3006890/

 

Is your lower rad hose cold when car's warmed up?

My heat was cold as well, it ended up being my thermostat.

 

https://honda-tech.com/forums/showthread.php?p=46504718

 

does the car get up to temp on the gauge?? if not its almost a guarantee its the thermostat stuck open

 

Ok I guess I give that a try hope thats my problem