To summarize unlike traditional radiators which can make a room feel chilly at times and too hot at other times underfloor heating does not overheat instead it achieves the desired temperature set by you using.
Heat at floor but cold at windshield.
When the metal edges of your windshield heat up faster than the middle of the glass this can cause stress that leads to cracking.
But assuming it s no hotter than an average garage no this would not cause a windshield to crack.
The windshield vent is hot.
Heat from direct sunlight will heat up both the metal and glass of your car but the metal will heat up faster.
Ive looked in the heating cooling section but cant find anybody with this same issue.
No heat to feet or defrost.
These cracks often show up starting at the edges of your windshield.
Love this car bought it in 1989 stored it but never let it go.
Radiant heat provides warmth from the floor up throughout the room without any cold spots or stuffiness in the area being heated.
The left dash vent is luke warm and the right now cool to slightly warm.
Before replacing heater control unit it would only blow hot air from front vents with this replacement it will now change from cold to hot and the air flow pressure does change from the front vents when changing the setting dial but there is still no air at all to feet and defrost.
The problem is the last setting full floor heat.
When turning the control knob dash red up blue down i always have heat from the floor and windshield vent and only intermittently have heat out of the dash vent.
Before spending the rest of your day filing tps reports at a job you hate.
Unless you live in a tropical climate year round you ve likely been forced to become a cold and pathetic vessel of sadness as you de ice your windshield at 7 30 a m.
Nothing coming from floor vents when i select the floor vent everything blows out of the defroster vent at the windshield the face vents work fine and when the defroster is selected it works fine just the.
Heater working but only blows out front vents.
Unfortunately maxing out the defroster takes too long and self heating windscreens rely on always.
Some times when on full floor i get heat from defrost vent next to windshield and from the dash vents and some from the floor.