Gas and Oil Home Heating Furnaces - Ack! Furnace runs but blower doesn't!

Hi, my home has a Goodman furnace unit in it and is about three and a half years old. This morning I woke up to no heat, and walked to the garage. I could plainly hear the furnace unit running, but it was not and still isn't blowing any heat at all into the house. Furnace runs, blower isn't. I've skimmed the topics and could find none applying to this situation. Any ideas?

This is well beyond my expertise, but i do know that it can certainly be dangerous if the blower fan does not come on to clear the heat from the exchanger. If the system is electric, check for thrown breakers; settings at the thermostat (fan on vs auto, both should work). I'm dealing w/a similar problem right now but on a furnace of ~1950's vintage. On this one there's a blower fan control switch with a relay that seems to stick. When i give it a bit of a thwack, the fan comes on. As new as your system is i have large doubts about this type of thing being the cause of your problem. However, not much damage can be done by lightly tapping on controller-box looking things on the outside of your furnace. Do observe the usual precautions of tapping on things with non-metal objects or the BACK of ones hand if anywhere near voltage to avoid a fastideous grip and an hideous grin.

Looking at thine post again, i would check first your batteries in your thermostat. That seems the most likely thing to fail in the given time period.
-May you be warm

You may have lost the blowers low speed or a relay is not bringing the blower on. Like said though put the stats fan option into the on position and calling for heat. See if it works now.

In heat mode does the blower want to start at all?

If you know how to use a multi meter you can check to see if your low speed is getting juice or not.

You may have lost the blowers low speed or a relay is not bringing the blower on. Like said though put the stats fan option into the on position and calling for heat. See if it works now.

In heat mode does the blower want to start at all?

If you know how to use a multi meter you can check to see if your low speed is getting juice or not.

As I was sitting here reading other posts, the furnace kicked on. Why it suddenly came on, I have no idea. I lowered the thermostat to see if I could make it shut off and come on. It went off, but would not come back on until I moved the thermostat setting about four degrees over where the current temperature is. I'm going to change the thermostat batteries now, but I remember reading the manual on it, and it said it had a low battery indicator - which is not on.

Wait...now it's off again for no apparent reason. The house has not reached the temperature it has been set to on the thermostat, yet it kicked off.

Okay now I'm worried. It just came back on. I called the company that installed it, because it's simply too unpredictable to rely on at this point.

It goes off and on seemingly at random now. Changing the thermostat batteries made no difference. So, the relay that needs to be working, is working...just not in the intended manner.

To summarize:

1.) Furnace on, no blower.
2.) Furnace and blower non-functioning.
3.) Furnace and blower functioning but in seeming disregard for thermostat settings.
4.) Furnace and blower non-functioning (and not reaching thermostat setting).

Batteries have been changed in thermostat. Other than that, I'm all out of ideas. I've had nothing but problems with this Goodman unit.

Fifty dollar service call for a blocked hose. That hose leading from the small black valve to the large "mouse wheel" looking thing had some blockage in it. Previously, I'd unclogged the valve nipple and the furnace worked fine. This time, the blockage was in the hose itself. Where the blockage comes from I don't know. What I do know is every single year this furnace has blockage either in the valve nipple or now, the black hose.

So there we have it. The blower would not kick on (or kick on when needed) because the hose linking the small black valve to the larger motor had some blockage in it. I hope this helps someone.

Glad you got it fixed so quick. $50 bucks isn't bad.

It is when all the dude did was literally blow through the hose to clear said blockage. It actually made me a bit irritable to know last year I paid 25 for a guy to clear the valve out, and this year 50 bucks to blow the hose out. I have to think the contractor who installed these units is making a killing for work that entails nothing more than using a nail to clear valve nipples and/or exhaling into a hose. What a scam.