Occasionally my 10-year old, gas furnace "kicks on" but, rather than blowing heat, it blows cold air. I assume the gas is not getting ignited.

If I set the thermostat off, then back on to "Heat", the heat then flows; i.e. it seems to need a reset.

Is this just a failing switch in the furnace?

Thanks,

Erling

 

Read B-4 U post. Need info what do you have there? ED

 

I'm sorry. I don't understand your reply.
Read what?
What info do you need?

 

Okay. I found what you're looking for:

1. In which area you live and ambient temperatures you usually experience. North Central, Texas - winter 30-50 deg F
2. House style and construction details. Frame, Stucco
3. Make, model and age of equipment related to the problem. Well...Make-Model: I haven't made it up in the attic yet. If I need that first, I'll get it. Age: 10 yrs
4. Fuel type. Natural gas
5. Water temperature and pressures of boiler systems. N/A
6. What type of zoning do you have with your boiler system. N/A
7. Thermostat type. Honeywell, programmable
7. Anything else that would be useful. No detail is to small. The more information you provide the easier it becomes for the professionals in this forum to determined the cause and correction to the problem.

 

What make is it. Is it a 80 or a 90 afue? Lp or nat gas do you know what kind of pilot light you have there? ED

 

Sure this is not a Heat Pump?

I have not seen a gas burning furance blower running with out flames unless the t-stat is set to fan "ON"

Filter been changed?

 

Sounds like you're going out on a safety. Turning it off then back on is resetting it. Have you changed the filter lately? If so what kind are you using? Are any of the return vents blocked? Also has this furnace been cleaned in the last couple years by a pro?

 

Cleaned by a professional...uh...well...maybe once in 10 years.
I guess I know where this is headed. :-)

I'll give someone a call.

 

Don't be blushing. The poor old furnace gets neglected by more than just a couple of people and it's easy to forget.