This eaxhaust manifold temperature warning light is getting ground from somewhere, thats why its lighted up, ask the electrician to check ...
Btw what is the status of Auto Fan & T-stat valve ?
And did your electeician connected the Oxygen sensor propeely ?
ECU's of these A series engine are very very dumb, many times it doesnt throw a check light, even when things are not right, so one should check manually that all sensors are connected properly.