Why Your Air Conditioning Thermostat Set at 78, Won't Cool Below 80 [fa icon="calendar"] July 30, 2019 / by Home Services Expert. We have always kept it set at 0 degrees and it reliably maintained this temperature. The reason for that is simple: a thermostat has no control over how quickly your house heats up; all it does is set the final temperature for your comfort level. When your thermostat struggles or fails to reach the desired temperature, it could be frustrating, not to mention uncomfortable! Sadly, this is a comfortable outside temperature. A furnace doesn't heat all the air in the house -- it just heats the air that the ducts bring to it. We usually keep it set to 72 degrees. On most occasions, the whole thermostat is replaced. Is it a problem with the thermostat? Lately (especially on really cold nights) the house will not heat properly and we wake up to a freezing home with a temperature in the low 60s. Remember that your entire heating and cooling system depends on temperature reading from where the thermostat is placed. Search this thread. Press the PROG button to save. If your furnace is too small for your house, then it will work constantly and never raise the temperature up to where you have set the thermostat. Kenmore Elite model 253.26752100 has worked perfectly for about 5 years. Example: If your thermostat is set to turn on at 72º in heat mode, with a span setting of 2, your thermostat will activate your furnace when the room temperature hits 71º and shut it down when it reaches 73º. In the second (right) screenshot, on a different day, the heat was set to 72, inside temp was 73, and again the system continues to run. 5. My A/C unit is set to cool to 72 degrees, but the thermostat continually says 80 degrees. • Auto: When enabled, the thermostat will automatically use heating or cooling to reach the desired temperature. But your furnace can deliver only enough BTUs to heat to 78 degrees. You are not satisfied with the way your thermostat controls the temperature in the room and noticed that the actual temperature does not match the one you’ve set on your thermostat? But if your thermostat is not holding temperature then your home will feel cooler than it should. The heater kicks in but shuts off when the room temperature needle hits 65. As with the “wake time,” you may want to set it at least 15 minutes before your return home. Show Less. Active 3 years ago. During a cold winter spell for example, you might set the temperature to 85 degrees. Why won't my furnace adjust to the heat temperature set at the thermostat but will work with the cool setting? It is only at 18 because I have open fire on too, otherwise it would drop down to 15 degrees. This test will require that the power be on long enough to heat the water until the upper thermostat turns the element off. 1. Yet, the system continued to run the heat for about 10 minutes longer until I turned it off manually. For this, you may need to first turn off the electricity supply to the geyser and then oven the protective covering. If you want it to reach the set temperature, then you need to ensure that it is correctly placed. Viewed 2k times 0. Answered in 2 hours by: 1/11/2008. At this point, the upper thermostat should divert power to the lower heater circuit. Make adjustments where necessary. Report This by Manage My Life. Thus, most people keep their air conditioning thermostat set at 72 to 74 degrees Fahrenheit. You can set thermostats way higher or lower than the HVAC system can deliver. And remember that in extreme weather conditions, even properly-working equipment might not reach the temperature set on the thermostat. For example, the temp selector needle is bent indicating you have set it at 70. I'm having a problem with the thermostat at my new place. 11 1 1 silver badge 2 2 bronze badges. When you’re in your house, you expect it to be cooler. You can also try resetting the thermostat by turning it on and off. Category: HVAC. Is this a problem with the thermostat or the heater? Share this conversation. Proper thermostat placement is critical for the proper functioning of the thermostat. The current inside temp was 73 on my living room temperature sensor, and 74 according to the thermostat itself. Your thermostat may not be set properly. Again, you will see the hour portion of the set point time and the AM/PM indicator will be flashing. If it's not a digital thermostat one of the pointers may be damaged and not pointing out the correct temp. Furnace won't shut off when set temperature is met? share | improve this question | follow | asked Oct 8 '13 at 19:44. I have set it for 21 degrees. Heating thermostats work by monitoring the average temperature of your home and sending a signal to a boiler to ensure it’s never too hot or too cold. Page 9: Auto Changeover Mode Auto Changeover operation Auto changeover is available if the thermostat is configured for at least 1 heat stage and 1 cool stage and the installer enabled auto changeover. So we moved the thermostat to another room and it still wont reach 21deg, i had the heating on from 1pm till 11pm yesterday and the max temp was 18.5 deg! This setting can be changed to 0.5º, 1º, or 2º. Hello. A “dumb” thermostat makes you set the temperature manually. Yet your cooling system … 772 Satisfied Customers. The US Department of Energy recommends this. You will likely hear the system click as it engages and turns on the air conditioning to lower the temperature in the house to what you have set. Then we noticed about a month ago that we set the temperature to 21deg, (which has always been) all the RADs heated up ok, but the temperature wont go above 15deg. Sometimes the thermostat may need to be recalibrated to better reflect accurate temperature and cooking times. But before would heat up ok at 21deg within about 2-3 hours. We're in Southern California and the cold weather has recently started so I went to check the thermostat. 6. Upright freezer won't reach set temperature anymore. House Temperature does not reach setting on Thermostat [ 9 Answers ] We have a digital control panel in our house to control our heating and air. For cooling at 72º with a span of 2, your air conditioner will activate at 73º and shut down at 71º. SCORE. WHY WON'T MY DIGITAL THERMOSTAT TURN ON MY HVAC UNIT? A central heating thermostat is a set of controls used to regulate the output of your heating system, to make sure a comfortable temperature is maintained. It’s best to think of a basic thermostat as a temperature limiter. Or is there a heat sensor problem? Because of the extreme exterior cold it will keep trying to reach the set thermostat temperature, but won’t be able to quite get there. You’ll find that you stay cool, but you won’t feel comfortable. You will see a different display number come up that corresponds to the temperature you set. This issue could result in a temperature reading that is higher or lower than what you initially set the thermostat to. Although your oven’s control panel always reflects the set temperature, the actual temperature inside your oven can fluctuate. Submitted: 13 years ago. It doesn’t know to … Wrong location. My honeywell room thermostat won't reach the set temperature. But that won’t help you feel warm and comfortable any quicker. Set the time and temperature for “return” mode. 1st, 2nd and 3rd gen Nest Learning Thermostat: Press the ring and choose Schedule . SOLUTION: In this case, you may need to reach the thermostat first and then turn it to a desired setting. Ask Regan Land Your Own Question. Heater doesn't reach temperature set on thermostat. The problem could require just a simple fix of a quick setting change. Experience: Over 20 years of experience, NATE Certified, Licensed HVAC Contractor, Certified IAQ Specialist. The thermostat will now display the DAY set point time and temperature. Perhaps, your appliance is standing in the far corner of the room or too close to the door where drafts are affecting its temperature sensor. The selector needle is off 5 … Essentials for a Perfect House Vent Cleaning [lwptoc skipHeadingLevel="h1,h2,h4,h5,h6"] If you live in a centrally conditioned house, you would probably have vents all over your place. Has been like this for 2 days. No matter how low I set the temp, the thermostat stays between 76-80 degrees. If instead you want your system to start at the scheduled time (not before), disable Early-On; your home won’t reach the target temperature until after the scheduled time. Marylyn Marylyn. add a comment | 1 Answer Active Oldest Votes. Nest Thermostat E: Press the ring and choose Settings Schedule. On your thermostat: Go to the schedule screen on your thermostat. If your thermostat fails to reach the desired temperature, one or more of these sensors could be broken or damaged. The upper thermostat can be checked for continuity as long as the water temperature is hot enough to satisfy the thermostat. I apologize if this question has been asked before but here goes. heating furnace. The house was boiling hot, so I turned the ac on and set the thermostat at 70 degrees. Thermostat won't display temperature and won't control heater (although fan works) Ask Question Asked 3 years ago. Category: HVAC. June 17th, 2012. Or, during a summer heatwave, you might set the temperature to 72 degrees. 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