Heater core may be defective
Most common problem is that the blend door is stuck or broken.
OK, did the blower motor actually just stop, or does it still blow but no heat?
my 94 explorer wont blow heat
An air conditioner blows out heat
the heat blows out the defrost when it should blow out floor vents only
Check the colant level, it may be low.
is there heat to blow or does the blower not work chk thermostat or vacuumn at htr sw respectfully
It's because of the heat from your blow dryer.
Because the air selector died.
it wont blow heat itll blow cold air
Yes you can use heat on Monofibre extensions. You can use a blow drier on a medium heat or heated rollers. You shouldn't use straighteners ,but you don't need to. If you want Monofibre to be totally straight you can blow dry it straight. You should not use a blow drier on a top heat.
Check connection of ducts, check for blockage prevent air flow, check for vacuum problem prevent open/close of ducts