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Why is my AC draining my car battery?

Las Vegas, NV, Thermostat Maintenance

The minute homeowners start noticing inconsistencies in their home temperatures, they usually assume the whole HVAC system is on the fritz. But sometimes, a nonresponsive thermostat is just that: nonresponsive. Your expensive heating and air conditioning systems are only as good as the thermostat that detects and sets the room temperature. If you have a digital wall unit that’s starting to fade or flash, the batteries are impacting the efficiency of your whole heating and cooling system.

Thermostats can be hard-wired or battery-operated, but even battery-powered models should work for several months to a year or more without new batteries. If you’re replacing batteries in your thermostat unit as often as once a month, that’s not normal for most systems and you should give our team a call.

Why thermostats can drain batteries

The simplest answer is also the most likely: The thermostat is old or just faulty. The temperature settings you program into a digital wall thermostat don’t impact battery usage (e.g., turning down the air conditioning in the summer won’t save the battery life of your thermostat; you’ll just save on your energy bills). Since there’s not much in terms of usage that causes the problem, it’s most likely a problem with the type of battery or with the unit itself.

Checking the batteries

First, check to make sure the batteries are, in fact, dead. Depending on the exact thermostat model, you should see a battery compartment on the side, back, or underneath a sliding panel with space for two or more AA or AAA batteries. Most thermostats are not compatible with rechargeable batteries, which don’t deliver the right voltage, so stick to single-use options.
Once removed, test them in another device to make sure it’s the batteries that are draining and it’s not a problem with the thermostat unit’s ability to connect and draw power. Even if the screen on a digital thermostat fades or a “replace battery” light comes on, that’s not a sure sign the battery is dead, only that the wall unit isn’t getting enough power. Non-lithium batteries may also drain faster, so make sure you’re using a quality, brand-name lithium battery to ensure the longest life.

If the problem is with the wall unit, either because it can’t get enough power from good batteries or it’s draining them unusually fast, it’s normally not very cost-effective to repair the small thermostat. Instead, it’s easier to replace the wall thermostat with a new unit and see if the charge holds longer. Sometimes, the thermostat will be covered by a manufacturer’s warranty (Honeywell is one of the most common brands) or by your builder’s warranty and/or homeowner’s insurance. Yes! Air Conditioning & Plumbing can replace the unit with the same kind or take the opportunity to upgrade the model while we’re at it.

Why we love the Nest thermostat and smart home products

If you decide it’s time to upgrade from a battery-powered digital thermostat that’s draining AAs at a blinding speed, you have a great opportunity to opt for a programmable or even smart home thermostat to help minimize energy usage.

The reason Yes! Air Conditioning & Plumbing loves to recommend the Nest thermostat is because we’re committed to 100% satisfaction for our customers and exceptional service. If there’s one product we’re most confident about delivering on these promises, it’s the easy-to-use Nest system. You don’t need to rewire your whole house, and the Nest thermostat works with 95 percent of low-voltage (also called 24-volt) heating and cooling systems used with furnaces and central HVAC systems that are common around Las Vegas.

A smart thermostat like Nest learns without being laboriously programmed when you’re most likely to be home and what temperatures you prefer throughout a given day or season, adjusting automatically or via your command over a Wi-Fi connection to keep you comfortable without running unnecessarily while you’re away. As a result, you can save anywhere between 10 and 15 percent on your heating and cooling expenses, making it a great upgrade option if your current thermostat is costing a small fortune in fresh batteries alone.

Visit the Nest Thermostats page for smart home thermostats and the Nest Protect page to see the latest in complementary fire alarm safety systems.

Satisfaction guaranteed

Whatever option you decide is best for your thermostat—replacing or upgrading to any new model—you can trust Yes! Air Conditioning & Plumbing to install it. We back up all our services with a 100% satisfaction guarantee, from installing a completely new central heating and air system to connecting a new thermostat. Plus, if you’re interested in a new thermostat in order to help you save on energy costs, ask us about other ways to cut down on monthly utility bills and we’ll inspect your plumbing and HVAC systems for even more ideas! Give us a call today, tonight, or anytime. We’re ready to help Las Vegas residents 24/7 at no extra charge.

Contact our team for a home inspection today.

  • Thermostats

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Does a Car Phone Charger Drain Your Car’s Battery?


A phone charger may drain your car’s battery, but so will the multimedia player or using any other accessory that runs on electricity excessively. Confused? We’ll explain.

Why Is It Not Recommended To Charge Your Phone in Your Car?

  • Too little power

You may have tried charging your phone on a road trip or on your daily commute. If you have, you also would’ve noticed that sometimes, your phone only goes up a few points in a duration that would normally charge half your phone’s battery. Heck, even worse, your phone’s battery percentage may have even started to reduce whilst being charged.

This happens because your phone receives much less power than it’s consuming. This is a common phenomenon with car phone chargers.

At times, you may find your phone getting charged at ridiculously high speed. This is normally because the power it receives is much higher than it needs. It could either be your USB cable or your charger — either way, it may bring your phone’s battery health down to the wire. In other words, it’s better that you avoid it unless it’s an emergency.

Can a Car Phone Charger Drain My Car’s Battery?

Now that you know why charging your phone in the car isn’t always the best idea, let’s find out if the deed can drain your car’s battery.

Your car charges its battery when the engine is running. In other words, while your car’s lights, multimedia player, phone, laptop charger, etc. drain the battery, it’s also being charged back simultaneously.

When you turn on your car’s lights, phone charger or any other accessory when the engine is off, that’s when your car is at the risk of battery drainage. For instance, imagine a couple of teenage kids who went to sit in the car just to chill. They turn on the AC, listen to music and charge their phones while they’re at it.

They’re using all these appliances that run on battery, without starting the engine. Now that’s going to have consequences, isn’t it?

You do it for long enough and you’d be out of battery. If you’ve got an old car or worn-out battery, it will die even quicker.

In other words, your phone charger will only drain your car’s battery when it’s done without starting the car first. On average, a car phone charger only pulls about five Watts of energy which is negligible. But if done for long periods of time without starting the car or recharging the car battery, your battery will definitely be on its way to complete drainage.

Lastly, Always Prioritize Safety

We advise that you always avoid charging your phone in the car because it may affect your phone’s battery health. But if you have to, always do so when your car is running. Even if you’re stuck on the side of the road due to a roadblock, never utilize your car’s battery without twisting the ignition key first.

You may also want to be careful about plugging in and plugging out your phone while driving. Anything that diverts your attention from the road and your steering wheel is not worth it. If you want to charge your phone on your commute, make sure you put it on charging as soon as you step in the car.

Another idea would be to purchase a power bank and utilize that for emergencies.

Are you draining an electric car’s battery by using air-conditioner?

Hello people. This article discusses whether you are draining an electric car’s battery by using air-conditioner. Electric vehicles are still relatively new, and there is a lot of misinformation about battery range out there.

Air-conditioning system is an integral member of automotive systems because it is not only responsible for the thermal comfort of a passenger but also for the safety of the passenger, to an extent. The primary purpose of an automobile air-conditioning system is to maintain the vehicle cabin temperature and humidity at comfortable levels for a passenger.

It is also responsible for recirculation of air inside the cabin and prevention of stagnation of stale air which will consist of CO2 from the passengers, volatile organic compounds, and other particulate contaminants.

However, this system increases the energy consumption of a vehicle and influences its performance. AC can be considered as the main accessory which extracts the largest quantity of power when it is operating.

The power necessary to operate the vehicle air-conditioning system is related to the peak cooling load generally related to the outside temperature. Li-ion battery has a good performance and gives good dynamic characteristics simultaneously for the electric vehicle propulsion system and the air-conditioning system.

A significant benefit could be achieved if the vehicle is equipped by an intelligent power management controller based on the air-conditioning system of the electric vehicle.

However, warmer weather usually means that you should pay closer attention to your vehicle to keep its battery life healthy and running smoothly. So how should you be taking care of your EV as the temperatures go up? Follow these tips to preserve your EV’s battery life.

Avoid fast charging when it’s hot outside

Combined with the high temperatures caused by the weather, your EV battery may be unnecessarily overheating if you opt for fast charging. Slow charging is the way to go instead in hot weathers.

Use the preconditioning feature

Almost every EV comes the preconditioning button. Preconditioning helps you plan ahead for any extreme weather conditions so your EV will run at the optimal temperature when you’re ready to get on the road.

Preconditioning works by adjusting the inside of an EV’s temperature to optimal levels. All you have to do is input the weather forecast into your vehicle’s mobile app and it will change its internal temperature accordingly.

If the weather is expected to be freezing cold, preconditioning will warm up the EV’s interior so that when you enter the vehicle you’ll be ready to start driving. The opposite goes for hot weather i.e., EVs will lower the temperature inside the vehicle to keep the vehicle cool before your big trip.

The battery temperature also adjusts for any temperature changes when preconditioning an EV. By using this feature, your car will run smoothly and preserve its battery life, despite the weather outside.

Park your vehicle in a shade

Electric-powered items tend to overheat and perform more poorly when they are exposed to prolonged heat, and EV batteries are similar. One of the easiest things to do for your EV when it’s hot outside is to simply park it underneath some shade.

Use less applications while you drive

When you open several applications on your phone, the device starts getting hotter and runs slower. EV batteries behave in the same way. The more background processes that run on your EV, the hotter your battery gets.

When in hot weather, it may be wise to close some of those external applications if they’re not important. Game apps, text messaging and music streaming services that are running on your EV’s software are just a few features that can be closed to save your vehicle’s battery life.

Leave the EV plugged in

When an EV is plugged in, it automatically draws upon these systems to regulate the battery’s temperature using the electricity directly from the outlet. This is a little bit different from preconditioning.

Whereas preconditioning works due to your input, thermal management systems are automatic and get activated whenever there’s a need for it.

Only charge your EV up to 80%

Electric car batteries are the same type found in electronic devices like laptops and smartphones. So, when it comes to charging, there is an optimum percentage you need to bear in mind to avoid overcharging.

Most manufacturers recommend not fully charging your electric car to 100%, otherwise the battery can get too hot. In hot weather you should only charge your electric car up to a maximum of 80%.

Use eco-mode while driving

Most electric and hybrid cars have an eco-mode driver setting that increases the efficiency of your EV. It does this by limiting the amount of power you have for electronic systems and accelerating, for example.

Because your electric car will be using more energy in the heat, making use of this mode will significantly save your EV’s range. You can then spend less time stopping at charge points to top up your batteries.

Avoid driving between noon and 3 pm

The hours between noon and 3 pm are usually the hottest, so try to avoid driving during these times. By doing the majority of your journey during the cooler parts of the day you can reduce the amount of energy your EV uses.

Extreme temperatures are known to use more of your electric car’s battery power, especially in the heat which can cause the unit to overheat and use more energy than normal.

Check your tyre pressure regularly and before any long journey

Electric cars weigh more than Internal Combustion Engine models because of their battery packs. This means you need to take extra care monitoring the tyre pressure when driving an EV.

This is especially true in the heat, where underinflated tyres can reduce efficiency. In the worst-case scenario, you could experience a blowout that threatens the safety of you and your passengers.

Hope this article on whether you are draining an electric car’s battery by using air-conditioner. To read about jobs in the Electric Vehicle Industry, please visit Job opportunities in Electric Vehicle Sector and its Charging Infrastructure industry


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