The main switch won't turn on of my Lifesmart infrared heater

What engine do you have?

Disconnect the battery for about half minute (negative side) so the compie can re-ajust itself.

if it doesn't blow for a.c. as well then its the switch. if it does then your heater. have a shop take a look at it.

If it's an automatic check fuse #15 wether it's a stick or automatic you should have power at the red & black wire coming out of your ignition switch when you turn key to start postion and power at the red wire going into switch at all times. if no power coming oit on the red/black wire you need an ignition switch. if there is power coming out of switch try putting car in nuetral (for auto trans). if still nothing you'll need to check for power at small wire going to starter when key is turned to start. if has power then need starter if no power you'll need to check starter interlock relay.

Check for a broken wire in the door jam. Other wise I think, You need to research this more, that the Left Front Power Window Switch is actually a door module. I would guess it has either lost power or gone bad.

I had the same problem and couldn't figure it out. Changed all the same components you did. Finally broke down and bought a distributor. Soon as i put it in, it started right up and has been running since. Main fuel relay could cause it to. i re-soldered mine.

check the speed control chip,is located behind the glove compartment just unpluged and remove the two screws,you have to remove the glove compartment,good luck.................

I think ur fuse short, check all the main fuses

check main vent on off switch.

you might check your switch sounds like to me that your two lower speed sides of the switch maybe burnwed out.