Heater blows air at first but when..

[aquaman0001]

Today when I went to start my car in the 16 degree weather. I noticced after I cycled my glow plugs and start the car the heater blower goes off. It blows on high and low when I am cycling the plugs but the second the car starts the blower cuts off. Does this rule out the possibility of a bad fuse and current?
Thanks,
A

[pmckechnie]

if the system is in AUTO mode and calling for heat the fan will stay off until the engine reaches 60 deg C (I think). That keeps the 16 deg air from blowing on your feet. Does your fan come on after the engine warms up some? If so, it is working correctly.

[aquaman0001]

Thanks for the reply. I did not try keeping it on "auto". I had it on low after the car started. But the blower literally cuts off the minute the car starts eventhough it was blowing 10 seconds earlier.

[kerry]

If you push the defrost button it should override the cold shut off circuit. On mine it typically takes about half a mile of driving to get the coolant to a temperature which overrides the cut out switch if the air temperature is 25 degrees or so.

[aquaman0001]

Kerry, thanks for the tip. I will try this today. So if the defrost does not stay on after I start the car could this be related to an internal temperture sensor? The sensor thinks the internal is warm enoough but its not.
Thanks.

[aquaman0001]

No air flow nomatter what setting I have it set to. Even adjusted the temperature setting thinking it was not blowing becuase I was calling for heat. No dice. Any thoughts? Its a bit chilly here in N. VA.
Thanks

[aquaman0001]

Toes are numb after commute. Can I wire the blower to stay on with an alternative toggle switch?
Thanks