It simply means the control board won’t allow the furnace to start. Heres each step I did and where I ended up finding the problem. Otherwise, you may have another problem, such as a leak in your refrigerant line. Start by turning the furnace off, turn your thermostat to “fan only,” and wait a few minutes. Now put your furnace’s blower fan to the test. If you find any of these problems listed below in your central air, contact your favorite HVAC contractor for additional help. Questions: We have many people ask, “how can I find out why my fan blower motor is not working?” “Why does my fan motor not work when I turn on my furnace or air conditioner?” Answer: I found a real good Youtube video made by ACServicetech that explains the top 10 reasons why fan blower motors will not come on. If the fan does not start, you have a wiring issue (circuit breaker trips) or motor problem (circuit breaker does not … If you’re not sure why your furnace blower is cycling on and off when it s My furnace and Air conditioner is not turning on and the LED light is not on or blinking. The thermostat seems to be working and clicks like it is trying to turn the system on, but nothing happens. Furnace and air conditioner repair How much is a new furnace and air conditioner? Outside Air Conditioner Still Not Turning on? It's the most likely reason your heat won't turn on. When I turn the heat on it works just fine the gas comes on and the blower blows warm air into the house. Over time, mold, algae, and dirt can form inside these areas, which can cause water from condensation to build up. It is typically located in your basement and you’ll notice everything but one switch is on. Allow the furnace to sit for five minutes in this position, smelling closely for any trace of gas in the air. Another way to determine whether your furnace will not turn on due to your air filter is to listen for whistling sounds. Your furnace and AC share the same air exchange, so if you want everything to run at tip-top performance prior to starting up your air-conditioning system, exchange the dirty filter for a fresh one. When the blower fan won't start the problem could be something as simple as a blower compartment door that is not fully closed, or a clogged condensate drain. These same diagnostics also aid in air conditioning blower assembly diagnosis when an A/C blower continues running. If you have an older furnace that uses a gas-lit pilot light, check to ensure that the flame is burning. The lockout condition can be reset by turning the thermostat off and reducing the temperature to a value which would not cause the furnace to turn on. If even one of them is closed, it can make it more difficult to cool your entire home, since the warm air from the room with the closed vent will mix with the cooled air from the others. Turn the internal gas knob back on and shut the access door. 3 Reasons Your Air Conditioner is not Turning On. Unless it is a serious trouble and needs professional attention, you can solve most issues regarding RV AC not turning on by yourself. Check your vents to make sure all of them are open. Reopen the external gas valve and turn on the electrical power. Whether or not this is the cause of the problem, it’s a good early remedy to try. When I turn the air conditioner on the compressor and outside fan come on but the blower in the furnace will not come on. I turned the power back on, went up stairs and turned the air conditioner on. Your system might be turned off or your unit might be unplugged You can also turn off the heat and air conditioning, then slide the blower switch on. Air Conditioner Not Cooling Enough. In fact, I even recommend scheduling an annual furnace tune-up so that you can effectively prevent problems like this one from happening in the first place—and extend the lifespan of your furnace. Never use a power washer for this—it can damage the fins. Do not attempt to troubleshoot refrigerant or electrical issues yourself. If the pilot light was blown out, your furnace will not ignite properly. This water drips down to a pan. 6) Look for a tripped breaker or blown fuse. Back to Top My home is not getting heat Potential problems Your gas might not be on. Before jumping to conclusions or immediately calling for help, here are three places in your home to check out first. High-efficiency furnaces pull enough heat out of the air that water condenses. I put in the temporary temp change and I heard the click but the unit did not turn on. Electrical issues within your central AC unit are the most likely causes of your heater turning on when it shouldn’t. If that doesn’t work, then check your thermostat to see if it responds at all, and if it doesn’t, then you may need to get help from a Phoenix Trane technician. When to Call an Expert to Troubleshoot an Air Conditioner. Ultra Member : Jun 20, 2009, 07:44 PM Check for power, the breaker and the switch. If your furnace won’t turn on, it is usually either a problem with the circuit breaker or with the thermostat. My Air Conditioner is Not Turning On. We use cookies to give you the best possible experience on our website. The heat exchanger won't work unless enough cool air moves across it to keep it from overheating. So, your air conditioner won’t turn on. Step 4: Look at the Condensate Pan. The most common cause of your air conditioner not turning on is an excessive build-up of water from condensation within your HVAC system. When your furnace won’t turn off, because it can’t reach your desired temperature . Some furnaces will enter a lockout condition if an issue is encountered. With warmer weather quickly approaching, more and more people are turning to their central air systems. If your central air conditioner will not cool but you can hear it running, it may just need to be cleaned. My lennox air conditioner won't turn on. 1 Posts . There are number of problems and behavioral changes why your air conditioner is not turning on. There’s nothing better on the market than a Lennox furnace. The air handler might not be working because of a blown fuse or open circuit breaker. I have a comfortmaker furnace about 15 years old. This article series describes in detail the testing and diagnosis of problems with air conditioning fans and with forced warm air heating blower fans found in the air handler or AHU. If your AC won’t turn on, the team at Energy Air can help right away. I turned it back on and now I get nothing. Check your circuit breaker and make sure that the switch for your furnace is in the “on” position. More specifically, your system’s heater is turning on even though the air conditioner is set to “cool.” What is causing your heater to activate? A) Check your main electrical panel. Check the gas valve at your gas meter, the shutoff valve at the furnace and any other shutoff valves. And more often than not, the problem is that your furnace is just plain dirty: A dirty blower motor can lead to equipment failure. If you feel no heat in the minutes after you activate your furnace, something could be wrong with the belt, heating coils or furnace settings. 1# Fault in the Power System. Try to pinpoint the root cause when the RV air conditioner won’t turn on. So if your furnace blower is turning on and off when the furnace isn’t in a heat cycle, it usually means the fan limit switch is defective. 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