The Furnace Is Blowing Cold: A Troubleshooting Guide

The middle of a harsh Ohio winter is no time for your furnace to blow cold. You want to curl up in a cozy house after you deal with harsh weather conditions, so it’s time to take a look at the reasons the furnace may be blowing cold. Some issues with the heat are easy to fix, but others require a qualified professional to get you away from the space heater and back to a house that’s warm all over. 

  • Thermostat problems – Your heat-related issue may simply be a thermostat that isn’t set correctly. Check that the thermostat is on and set to the heat setting. Then ensure that the thermostat temperature is higher than the ambient air temperature. If you use a smart thermostat or a programmable thermostat, check the programming to see if the temperature is set too low. If your thermostat doesn’t turn on or respond to temperature selection, it may be the problem.
  • Electrical problems – Many systems need electricity to power the blowers or light the pilot light. Check the breaker box and make sure breakers haven’t tripped or fuses haven’t burned out, as that would prevent it from working properly.
  • Ignition problems – Your HVAC system may not be generating heat because it can’t ignite properly. It may be in a lockout mode that prevents it from turning on, which needs to be reset by turning it off and on. It’s possible the pilot light was blown out and needs to be relit before the furnace kicks on.

If troubleshooting your furnace didn’t solve your problems, contact the pros at Apollo Home Heating, Cooling and Plumbing in the greater Cincinnati area. Our experience with heating problems gets you back up and running in no time, so you don’t suffer in the harsh Ohio winter for long.

"Ernie & Mike did a superb job on my new furnace and A/C installation. Despite having more than a day’s work to do, they came in and stayed until the job was done. They were organized, efficient, and protected the rest of the house well. Got both furnace and A/C installed the same day. Ernie was courteous, informative, and clearly knew his job better than anyone I’ve encountered before. The units look so good guests now get The Tour of our new system. Apollo is clearly not a fly-by-night company. I would recommend them to anyone in need of a new furnace and/or A/C."
- Jerry A.
"I called Apollo because of a water leak I thought I had in our upstairs shower going into the kitchen. Robbie came and assured me everything was fine & looked at all the other plumbing. He ended up changing a few pipes for our washer & clearing a drain. He was very nice & knowledgeable with all my questions. I ended up signing up for the care plan & was very happy with my service."
- Cassandra B.
"The team at Apollo exceeded my expectations. As a business owner, my attention to the details and commitment to providing excellent service is high. From the sales rep. to the installation team, everyone’s performance was outstanding. For example, the installation team went to great lengths to protect our floors, placing floor runners and across the wood floors and up the stairs. They even were spot washing walls upon their departure. I highly recommend this company."
- Randy B.
"We scheduled an estimate AND a tune-up. We knew something was wrong with our furnace, but hoped we could make it through the rest of the season. Upon telling Bill what our furnace was doing, he warned us immediately what the possible outcome was going to be; a cracked heat exchanger. He watched the flames roll backward, tested carbon monoxide levels, which were so high they meter’s last reading was 5,600 before saying “high”. He immediately shut it down, tagged it, and explained that with levels that high and children in our home he wanted off right away. He continued his inspection and showed us via a camera that not only was it cracked in multiple places, but had holes all over it. He gave us a few options for repairing it; his knowledge as well as genuine concern was beneficial and refreshing. Luckily we also scheduled an estimator, Micah, to come too and we were able to get costs between repairing and replacing (with several options). We decided to replace with a much higher efficiency furnace and one sized properly to our home. Hands down, not only did they both provide us great service and knowledge, but without sounding dramatic, they may have saved our lives. This was our first time calling Apollo, but it won’t be our last."
- Sarah B.
"Apollo is an excellent company. I always receive great service. Alex A. was professional and friendly. He kept me informed during the process of checking my furnace and heat pump to make sure they were working properly. The company makes sure you are notified who is coming and when they are on the way. All my interactions with the company have been wonderful."
- Beverly S.
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