What happens if you don't replace thermostat?

As the engine heats up, the thermostat gradually opens, allowing coolant to reach the radiator. Whenever it begins to fail, the engine overheats and, if the problem is left unchecked, leads to your engine boiling over. This can lead to costly repairs.

Can I drive with a failing thermostat?

Can I Still Drive with a Bad Thermostat? The easy answer to this question is no. While your car may be physically able to move and get you from Point A to Point B, you will want to refrain from operating your vehicle. This can lead to more parts of your vehicle being damaged, especially if the engine is overheating.

Is it worth replacing a thermostat?

Generally, it's a good idea to replace your thermostat roughly as often as you replace your climate control systems. So, every time you replace your air conditioner or heater, you should be installing a new thermostat as well.

What are the symptoms of a failing thermostat?

Thermostat failure symptoms that you should know
  • High temperature readings. The main symptoms of a failing thermostat are related to engine overheating. ...
  • Erratic changes in temperature. ...
  • Leaking coolant. ...
  • Increased fuel consumption. ...
  • Unusual noises.

What happens when you need a new thermostat?

Constant Temperature Shifts

A faulty thermostat typically has a hard time maintaining settings. It may continuously change temperature settings without warning. Try lowering the thermostat settings for a test trial and see what happens. If the same problem occurs, call a technician to check the thermostat.


How many years does a thermostat last?

As with any system, eventually, your thermostat will become outdated. Modern home thermostats tend to have about a 10-year lifespan but are usually replaced sooner due to innovations in the market.

How much does a new thermostat cost?

Each of these types features different price ranges, with manual thermostats ranging from $15 to $35 and smart thermostats costing around $200 to $300 or more.

Can a bad thermostat cause engine problems?

The lack of coolant flow due to a failing thermostat could also cause rumbling noises as your car engine begins to overheat. You may hear knocking, boiling, rumbling or gurgling sounds from your engine or your radiator. In this case, contact a mechanic immediately.

Can a faulty thermostat cause a fire?

The programmable thermostats constantly charge the backup AA batteries used to power the thermostat's clock. This can cause the batteries to leak, resulting in a fire hazard.

How often do thermostats fail?

Thermostats don't typically have a set lifespan for maintenance, repair, or replacement (unlike air conditioners that need a tune-up every year). Still, you can generally expect your thermostat to last at least 10 years. After a decade, thermostats may start malfunctioning.

How much should I pay to install a thermostat?

Labor Cost to Install a Thermostat

The average cost to install a thermostat is $250. Of this cost, the unit costs about $50 to $170, while labor costs are usually $80 to $200. Ideally, HVAC service technicians are the ones that install thermostats at a rate of $75 to $150 per hour for labor.

How many hours does it take to replace a thermostat?

An average thermostat replacement takes around 1 hour, with some taking as little as 30 minutes. More problematic replacements can take a little longer where there are issues accessing an awkwardly positioned part or if it's become seriously stuck in place.

Can installing a new thermostat save money?

Heating and cooling expenses can get quite expensive. One of the easiest ways to save on these expenses is by installing a new thermostat in your home. Thanks to advancements in technology, some of today's modern and advanced thermostats maximize energy savings to the fullest.

How long do car thermostats last?

However, most car experts recommend car thermostat replacement after 10 years. However, this is an optimistic number. Thermostats are more likely to stop working much earlier than a decade. Some factors that induce an early thermostat failure include harsh weather, rough driving, bad engine or thermostat parts.

What can damage a thermostat?

Thermostat failure can be caused by contaminated fluid or simply an old thermostat with weakened springs. Contamination happens when incompatible coolants are mixed, old coolant is not changed as recommended or particulate matter from gaskets or elsewhere breaks off.

What are some of the common mistakes when installing a thermostat?

8 Mistakes People Make With Their Programmable Thermostat

What causes a thermostat to catch fire?

The safety commission reports that contact between the thermostat wires and household line voltage can damage the thermostat and cause a fire.

How far can I drive with a bad thermostat?

The furthest you can drive an overheating car is about a ¼ mile before you risk irreversible engine damage. While some vehicles could still make it as far as 20 miles, we would never recommend driving very far with an overheating engine.

What does a bad thermostat sound like?

Another sign that your thermostat is going bad is strange sounds. You may hear rumbling sounds coming from the engine, and these sounds could be coming from the radiator because the coolant is boiling. It may also sound like boiling or knocking. Sometimes the sound can also be gurgling.

How can I test my car thermostat without removing it?

Start your car's engine and allow it to idle. Look through the radiator filler neck to see if the coolant flows. At this time, it should not be flowing as your car has not reached the operating temperature to cause the thermostat to open. If you find the coolant is flowing, it means the thermostat valve is open.

Do you need an electrician to install a thermostat?

Your best option is to have a C-wire properly installed and run to your new thermostat, which means it will require an electrician's expertise. Even if you find a DIY article or video online, the risk to your health or home isn't worth it when dealing electrical wiring.

Can I change my thermostat myself?

It is possible to save some money by installing or replacing your thermostat yourself, but you will need: Basic electrical knowledge. A general understanding of the type of equipment being used.

Can I replace my old thermostat with a new one?

In most cases, you can replace your thermostat without having to make any other adjustments to your HVAC system. And if you're switching from a manual thermostat to a programmable model, the upgrade will often quickly pay for itself in future energy savings.

Does constantly changing the thermostat cost more money?

It saves time, energy, and money. In summary, DON'T constantly change the thermostat setting when you are home—it wastes money, energy, and leads to equipment breakdowns. DON'T adjust your thermostat up or down to heat or cool your home faster—it doesn't work.

How do you test a thermostat?

Standard thermostats: Enlist a friend or family member to assist, Position one person by the thermostat and one person by the furnace. Slowly turn the thermostat from off to heat and increase the temperature. Both the thermostat and furnace should make a sound.