1998 Honda Civic 234,142 miles, stick shift. Works great. My air conditioner wasn't cooling. Added coolant, still doesn't work when really hot. Also windshield wasn't defrosting. Assumed mouse plugged. Speedometer light not lit between 60-80. Curious if maybe a sensor as I switched the vents to body instead of windshield, ran for 15 minutes, switched back to windshield and suddenly defrost is blowing strong and hot and speedometer light is now working on all speeds 🤔🤦🤷