41 posts, read 438,775 times 1,009 posts, read 3,064,328 times A defective contactor is one candidate. YouTube - Residential HVAC Contactors Part One Originally Posted by cgar22 Your queries reflect that you are NOT taking the initiative to do Google and YouTube research. Pretty much 2 types of internet users . The latter tend to seek out others to exploit with endless questions. 3,537 posts, read 10,227,433 times the fan should run when the unit is running , right ? Asked on: August 28, 2014 by Beverly H., Weston Which A/C fan setting costs more, “on” or “auto?” My friend believes the “auto” setting uses more electricity. That’s actually a common, but important question. The on/auto fan switch on your A/C thermostat will affect the price you pay to cool your home. The A/C fan circulates the cooled or heated air throughout your home. Setting the fan switch to “on” will make the A/C fan run continuously, 24 hours a day.

Choosing the “auto” setting will cause the fan to shut off with the rest of the cooling system as soon as your desired temperature on your thermostat is reached. Fan “on” costs more Advice from friends can be helpful, but in this case your friend was mistaken to think that the auto setting used more electricity. Let’s assume your air conditioner normally cycles off 30 percent of the time. In this example, turning the fan switch to “on” will make the fan run over 200 extra hours a month. For a typical size central air conditioner, that would cost you about $8 more each month. Keep in mind, a fan that runs all the time may also wear out sooner. Another reason to keep it on “auto” Setting your A/C fan to auto also helps provide better dehumidification. Have you noticed how moisture from the air condenses on the outside of a cold drink on a humid day? Your A/C unit captures moisture the same way, helping your home feel more comfortable. When the fan cycles off using the auto mode, moisture has a chance to drip from the cold cooling coils into the condensation pan and then drain outside.

However, when the fan runs all the time in the “on” setting, less moisture has a chance to drip and drain outside. Instead, some gets blown back into the air again. Some people prefer the feel or sound of the fan running all the time. If that’s you, at least now you know how much that choice will cost you.ac unit terminology Learn how to save even moreDuring Florida’s hottest months, we want to remind you that you can save five percent on your monthly cooling costs for each degree you turn your thermostat up. why does a central ac unit freeze upAlso, our top summer tips can help you save even more.low power ac/dc converter You can also take our Online Home Energy Survey to get a personalized savings plan filled with energy-saving tips and recommendations.

It’s easy, and can save you up to $250 a year. Did you find this Ask the Expert column helpful? Get more expert energy saving advice by following our Ask the Expert column monthly and remember you can submit your own question.Warm weather is on its way, which means that air conditioning units are firing up. However, there are some days when the temperature actually drops to a pleasant level. Here’s how to make your Nest Thermostat automatically shut off whenever the outside temperature gets cooler. Using a neat online service called IFTTT, you can tell your Nest Thermostat to automatically turn off if the weather ever reaches a specific temperature, that way you can open windows and save money by not running your AC when you don’t need to. For example, if the outside temperature reaches 73 degrees (which is good enough for opening windows and cooling your house), but the inside of your house is still pretty hot and the AC is still cranking, this is where something like this would come in handy.

You don’t need the AC on when the weather is that nice outside, so being able to automatically turn off your thermostat when the weather gets cool can not only save you money, but can also be a great convenience to have. If you haven’t used IFTTT before, check out our guide to getting started for info on how to create an account and connect apps. Then, come back here to create your Nest Thermostat IFTTT recipe. For your convenience, we’ve created the recipe in its entirety and embedded it here–so if you’re already well versed in IFTTT, just click the “Add” button below and off you go. You’ll need to connect the Weather channel and the Nest Thermostat channel if they aren’t already. If you want to customize the recipe, here’s how we created it. Start by heading to IFTTT’s home page and click “My Recipes” at the top of the page. Next, click on “Create a Recipe”. Click on “this” highlighted in blue. Type “Weather” in the search box or find it in the grid of products and services below that.

Click on it when you find it. After you connect the Weather channel and get to the “Create a Trigger” page, select “Current temperature drops below” from the options. Enter in the outside temperature that you want it to be in order for your Nest Thermostat to turn off and then click “Create Trigger”. Next, click on “that” highlighted in blue to set up the action that happens whenever the trigger fires. Type “Nest Thermostat” in the search box or find it in the grid of products and services below that. After you connect the Nest Thermostat channel and get to the “Create an Action” page, click on “Set temperature”. Since IFTTT can’t turn off your Nest Thermostat, you’ll simply be setting the thermostat to a higher setting so that the AC turns off. On the next screen, select your Nest Thermostat under “Which device?” and enter in the temperature that you want to set your Nest Thermostat to. Something high like 80 degrees should be fine.