Brrr! Why does the furnace quit on the coldest day of the year and always on a weekend?
We feel your pain! So, to help, here are a few things you can do to troubleshoot the problem before you have to call for an emergency repair.
Top 3 Reasons a Furnace Blows Cold Air
#1 – Your Thermostat Is in the ON Position
Your thermostat has an ON and AUTO switch that runs your blower. If the switch is in the ON position, then the blower keeps running, even when the furnace is not heating. As soon as the furnace cycles back on the air will warm up again. All you have to do is switch the thermostat to the AUTO position. Then, the blower only comes on when the furnace heats.
#2 – The Pilot Light Is Out
A gas furnace has a small pilot light that stays on all the time. When the furnace cycles on, then the pilot light provides the flame that lights the gas and warms the air. If the pilot light goes out, then there is nothing to light the gas that fires the furnace. Lighting a pilot light is not hard but there are a few safety measures you need to follow.
Never try to light a pilot light if you smell gas in the room. Call your gas company’s emergency line and they will send someone to inspect your furnace lines.
If you don’t smell gas, then find the pilot light assembly. Most furnaces have a sticker with instructions on how to light the pilot light. If yours does not, then try to locate the gas valve. Switch it to the PILOT setting. Hold a lighted match to the pilot opening. If there is a reset button on the control panel, hold the button until the pilot light burns. Once it is going, set the valve to the ON position. If the pilot light won’t stay lit, then you may have a faulty thermocouple or a dirty port. You can try cleaning the port with a piece of wire. If the thermocouple is bad, you will need to call a professional to make the repair.
Some furnaces have an electric starter instead of a pilot light. If you cannot find a pilot light, then an electric heating element is probably what ignites your furnace. When an element malfunctions, you will need to call an HVAC professional.
#3 – The Furnace Has Overheated
If you can’t get your furnace to blow any air, hot or cold, it’s possible it has overheated. Safeguards are in place that shut off the burners when the unit gets too hot. More often than not, the problem is a dirty air filter. Furnace filters should be checked frequently for dirt and debris. If you have pets you may find that you have to change out your filter as often as once a month. Once the air flow is no longer restricted and the unit cools down, the furnace should start blowing warm air.
If none of these fixes takes care of your furnace problems or you are not comfortable troubleshooting the issue, contact a professional. Rheem Pro Partners are HVAC experts and have been serving Colorado and Wyoming since 1992.
Most of us are accustomed to the sounds our furnaces make. We barely notice the hum of the blower running or the little pops from the air ducts. These are normal, but what about the noises that get our attention because they aren’t what we’re used to hearing? Sounds that are suddenly loud or increasingly loud over time, or have a different quality than the typical sounds could be a signal that it is time to call a professional for a repair or maintenance. Don’t ignore them. Delaying service could result in loss of service, more expensive repairs or premature replacement.
Here are three furnace noises you should never ignore:
1. Loud scraping sound
A scraping, metal-on-metal sound is likely a problem with the blower wheel. One possibility is that the wheel has come loose and is scraping against the blower casing. If caught early, before there is much damage, your HVAC professional can tighten the wheel. This is a relatively easy and inexpensive fix. Another possibility is that the blower wheel is broken and needs to be replaced. Lastly, the most serious cause would be that the motor mount has broken and the entire blower assembly has dropped so that it is hitting the housing.
2. Loud bang or pop when furnace turns on
3. Squealing or whining noise
Don’t let furnace noises keep you up at night! Contact a Rheem Pro Partner today in Colorado or Wyoming, to schedule your annual maintenance check, and sleep peacefully all winter long.
Choosing the right furnace for your home begins with evaluating several factors including heating requirements, existing ductwork and insulation, the size of your home and the number of levels, and, of course, your budget. Armed with that information, your HVAC professional can help you determine which type will best meet your needs: single stage furnace, 2-stage furnace or variable speed furnace.
Here is an overview of these three types:
1. Single-Stage Furnace
The single-stage furnace, also called a one-stage furnace, operates with only two settings: “on” or “off.” When it is on, it is at the maximum level of heat output, with no adjustment for how warm or cold it is outside or within different areas of your home. Because this type of furnace is always on “high,” it lags in energy efficiency behind the other options.
2. Two-Stage Furnace
The two-stage furnace is a step up in efficiency from the single-stage furnace, with two stages that allow for some adjustment for changes in temperature. Most (about 75%) of the time, this type of furnace operates in the first stage which is approximately 65-75% of the furnace’s capacity, saving on energy. When the temperature drops and more heat is needed, the second stage engages to meet the current heating requirements for as long as necessary. Once the temperature warms up again, operation returns to normal, so you are only paying for the additional energy when you need it. Because of the lower output most of the time, the furnace does run longer, but this also allows for more even heat distribution.Two-stage furnaces have quieter operation, are more efficient and are better for the environment.
3. Variable Speed Furnace
The variable speed furnace offers the most flexibility in terms of operation and energy use. Instead of stages, this furnace relies on a fan motor operating at different speeds to adjust the amount of heat output produced. Increased airflow results in greater comfort, because temperature is more consistent throughout the home, and better air quality because more air goes through the filter. Even when the furnace is not heating, air can continue to circulate, which actually reduces the need for it to turn on as often. This results in energy savings and lower utility bills. An added bonus: the variable speed furnace is quieter than the single-stage or two-stage furnaces.
Rheem manufactures all three types of furnace.