No heat

Hey y'all. weirdest thing happened yesterday morning. about 15 min. into my commute, which by this time the car is warmed up to operating temperature, I notice that I have no heat. It dropped down to the 50's here in south florida (I know I shouldn't complain) so I needed a little heat. Here were my settings: defrost/foot button on, fan at level 1 or 2, thermostat at 3/4 (halfway into the "red" or heat zone). the air coming out was ice cold even at full red. checked all the fuses and they're good. checked again this morning: let the car warm up, tried defrost, AC, everything, both cold and hot and everything in between and now it works. will get on expressway later to try it again.

I find it hard to believe that the cooler temps yesterday morning would affect this in anyway. I did notice that while driving my temp gauge was a little less than half (more to the cold side) than normal which is exactly halfway.

Have you checked if the thermostat is sticking? Although if it was that hot I wouldn't think that would be the problem.

start car up let it wqrm up, hold the lower radiator hose and make sure it is hot . if it feels cool or just lukewarm replace the t-stat,,,,,,,,,if hose is hot, chk the heater valve cable adjustment make sure that the inside heater knob is not broken first of all and that when all the way on hot it opens the heater valve fully