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I have a 2005 Chevy aveo gt and My heat was working just fine on the way home last night and now this morning the heat won't turn on at all. Found a relay that clicks every time I try turning it on so I bought a new one and it just clicks too. I have two children so I need to figure this out quick. T.I.A.
sounds like the blower motor. its located under the glovebox. there are 4 8mm bolts holding it in along with the air duct hose and electrical connector. Its a good idea to also change the blower motor resistor. Heres a video https://www.youtube.com/watch?v=9f3iwcAeqi4
Edit: Check your fuses under the hood along with the ones on the driver side. fan replacement can be a pain.
double check the heater hose temps going in and out the firewall