When Should I Plug in My Engine Block Heater?

When Should I Plug in My Engine Block Heater?

What Does an Engine Block Heater Do?

Seeing as we live in an area that experiences less-than-ideal weather during the winter months, it can be crucial to know when to plug in your engine's block heater, and for how long you need to leave it plugged in. Even though most people who use engine block heaters drive a diesel, the extreme cold can sometimes have an effect on gasoline engines as well, and it could be beneficial to know when to plug your vehicle in. But first, let's take a look at how an engine block heater works.

As you know, most things don't especially like extremely cold temperatures, and the engine in your vehicle is no exception. When the temperature outside gets really cold, it causes the oil in your vehicle to thicken up. You know that your vehicle is dependent on oil to run properly, but did you know that if your oil is too thick it won't be able to flow like it normally does? Less flow causes more friction in your engine, and more friction causes your moving parts to wear down a lot faster than normal. With an engine block heater, you'll be able to keep the oil in your engine at an ideal temperature in order to keep it thin and flowing.

When to Plug in an Engine Block Heater

There are many different factors that can go into when you should plug your engine block heater in. A general rule of thumb is to plug it in for at least 2-3 hours, and if it's especially cold outside, possibly even longer. A lot of people will say that simply starting the vehicle and letting it idle is a good enough way to warm up the oil and the engine. While this does work, idling is extremely bad for your fuel efficiency, and even causes the engine to produce more harmful emissions. Cold engines burn more gas and burning more gas to idle means you'll have to make more trips to Petro-Canada in order to keep you tank full.

The longest you'll ever have to keep your engine block heater plugged in for is four hours. Keeping it plugged in longer than that is simply wasting your money by raising your electricity bill. Keep an eye on the temperature outside and plug your engine in for a little longer on the colder mornings before heading off to work. You can even get a block heater timer which will automatically shut off your engine block heater after a certain amount of time so you don't have to worry about remembering to unplug it.  

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Engine Block Heater FAQ for Ford Vehicles

What is a Ford engine block heater?

A Ford engine block heater is an electric heating element installed in the engine block to warm up the engine coolant or oil before starting the vehicle. It helps reduce engine wear, improve cold-start performance, and provide faster cabin heat during freezing temperatures.

Does my Ford vehicle have an engine block heater?

Not all Ford vehicles come with a block heater pre-installed. To check if your Ford truck or SUV has an engine block heater, look under the hood for a 3-prong cord or connector near the grille or bumper. You can also check your vehicle’s window sticker or owner’s manual.

How do I use a block heater on a Ford truck?

To use a block heater on a Ford truck, plug the block heater’s cord into a standard 120V outlet using an outdoor-rated extension cord. For best results, plug it in 2–4 hours before you plan to drive. In extreme cold (below -20°F), overnight use may be beneficial.

When should I plug in my Ford engine block heater?

You should plug in your Ford engine block heater when outdoor temperatures drop below 15°F (-10°C). This helps reduce stress on the engine and battery during cold starts. Using a timer can help manage electricity use more efficiently.

How long should I leave my Ford block heater plugged in?

Most Ford block heaters don’t need to be plugged in for more than 4 hours. Any longer typically won’t increase effectiveness and could waste electricity. Using a block heater timer is a great way to automate this.

Where is the block heater plug on a Ford F-150?

On most Ford F-150 models with an engine block heater, the cord is routed behind the front grille or near the front tow hook area. If it’s not visible, check inside the engine bay or consult your owner's manual for the exact location.

Can I add an engine block heater to my Ford?

Yes, if your Ford car, truck, or SUV doesn't come with a block heater, you can usually install one as an accessory. Ford dealers often offer OEM-approved block heater kits compatible with many Ford models, including the F-150, Super Duty, Escape, and Explorer.

Do new Ford vehicles need a block heater?

In most climates, new Ford vehicles don’t require a block heater, but it’s highly recommended in cold-weather regions. A block heater can help protect your engine, reduce emissions on startup, and warm up the interior faster.

What models offer a Ford factory block heater?

Ford offers factory-installed block heaters or dealer-installed kits for many models, including:

Ford F-150, Ford Super Duty, Ford Escape, Ford Bronco Sport, Ford Explorer and Expedition

Availability may vary by trim and region, especially in colder northern states or Canada.

How much does a Ford block heater cost?

The cost of a Ford engine block heater varies by model and installation. Typically, expect to pay:

$50–$150 for the part

$100–$300 for professional installation

Some Ford models also offer it as part of a cold weather package.

Is a Ford engine block heater worth it?

Yes, a Ford block heater is worth it in cold climates. It extends engine life, ensures reliable starts in extreme temperatures, and improves fuel efficiency on cold starts. It’s especially beneficial for diesel-powered Ford Super Duty trucks and vehicles frequently parked outside.

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