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Why is my furnace blowing cold air?

Post created: 2016-01-23 Type of Equipment: Furnace Views: 272

This question was created on the page: https://www.furnacecompare.com/furnaces/york/affinity-8.s.html.

On 2016-01-23 Gary wrote:

There are a few possible reasons why your furnace blows cold air. First, a furnace will blow cool air for a minute or so after it starts up, until the heat exchanger warms up. A dirty filter can cause the air to be cooler than normal. The thermostat may be set to 'on' instead of auto, which will cause the fan to continually blow. Other possible causes of this problem include a bad gas valve or igniter, or a faulty heating element. 



We get a lot of questions in the forum about furnaces blowing cold air -- If you'd like to have a contractor take a look at this, we can help you find one, here.

On 2016-05-29 Chris wrote:

We get this question at FurnaceCompare a lot, so we have finally written up the authoritative answer to: how to troubleshoot why your furnace blows cold air.

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