We have electric heat and it keeps blowing cold air. Why does it do this? Is this normal?

Here is what it does. When we turn it on in the evenings it first blows warm air, the shuts off automattically, later when it comes back on it blows very cold air and it never seems to heat up again. It will automatically turn on and off, each time blows only cold air. Plus it runs along time with the cold air, but a short time with the warm air.

You probably have electric HEAT PUMP, which works as you describe.

www.heatpro.us energy businessmen's knowledge

Yes, you really have to find out the MAKE and MODEL to get good answers. There IS more than one machine made.