Defroster not working? Get your car inspected at your home or office.

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How much does Defroster is not working Inspection cost?

It depends on the type of car you drive and the auto repair shop you go to. Our mechanics are mobile, which means they don't have the overhead that repair shops have. They provide you convenience by coming to your home or office.

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$70 to $80
Labor: $70 -$80
Parts: $0
Average Dealer price
$93
Average Shop price
$83
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Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
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ServiceYourMechanic PriceShop/Dealer Price
Heating AC Inspection for 1967 Mercury Villager V8-7.0LYourMechanic Price$70.00Shop/Dealer Price$84.52 - $95.41
Heating AC Inspection for 2009 Chevrolet Express 3500 V8-6.0LYourMechanic Price$70.00Shop/Dealer Price$84.59 - $95.53
Heating AC Inspection for 1978 GMC K25 L6-4.8LYourMechanic Price$70.00Shop/Dealer Price$84.54 - $95.45
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Heating AC Inspection for 2004 BMW 645Ci V8-4.4LYourMechanic Price$70.00Shop/Dealer Price$95.56 - $114.73
Heating AC Inspection for 1966 GMC PB1000 Series L6-3.2LYourMechanic Price$70.00Shop/Dealer Price$84.59 - $95.52
Show example Defroster is not working Inspection prices

Defroster is not working Inspection Service & Cost

A vehicle’s defrosting system is an absolute necessity for safe driving during the cold winter months. Driving with a frosted windshield or fogged rear window and no way to clear it off can lead to limited visibility and dangerous driving conditions.

There are a number of things that can go wrong with the defrosting system ranging from blocked vents to a defective heater core.

How this system works:

Front Defroster

The front defroster uses the same blower motor, fan and venting system that the heating and air conditioning system use. Air passes through the heater core and then dry air that has been run through the air-conditioning evaporator is added to help remove the moisture from the windshield. All of this air is sent out through the defroster vents on the top of the dashboard. The hot air removes the any snow or ice while the dry air helps eliminate the humidity and fog.

Rear Defroster

On most vehicles, the rear window has tiny lines going through it, which are electrical wires. These wires heat up as current flows through them. The heat displaces the condensation on the window. These wires produce a very low heat factor so there is no danger of anyone getting burned if they touch the window.

Common reasons for this to happen:

Front Defroster

  • Buttons Stuck: In some cases a button or knob for the heating controls becomes stuck. Moving them back and forth until it moves into the defroster position may solve this problem.

  • Blocked fresh air intake: The fresh air intake is at the base of the windshield. It draws in fresh air, which helps the defroster function. If leaves or other debris are blocking the air intake it will affect the defroster.

  • Vent Issues: If the vents on the dashboard are clogged, this will prevent the air from reaching the windshield. A quick vacuuming of the vents may fix the issue, if not the clog may be deeper in the system and require a professional.

  • Low Anti-Freeze: The heater core depends on hot antifreeze moving through it to heat the inside of the car. If the vehicle is low on antifreeze, it can affect the heating and defrosting systems. Anti-freeze should be checked and replaced on a regular schedule.

  • Malfunctioning Thermostat: The thermostat in a car works like a shut-off valve between the radiator and the engine. It remains closed when the car is first started to build up heat. Once the engine is warm the thermostat opens up to circulate anti-freeze to prevent the engine from overheating. If the thermostat is stuck open, the engine doesn’t warm up, so the defroster will not have the warm air it needs to function properly.

  • Bad Heater Core: The heater core is basically a mini radiator that is located behind your dashboard. It is the heart of the heating system and essential to the defrosting system. There are a number of things that can cause a heating core to go bad, it can become clogged up due to contaminants in the anti-freeze, hoses can come loose or broken and control valves can become stuck. A bad heater core will result in no heat, which means a non-functioning defroster.

  • Bad Blower: The heating and defrosting system rely on an electric blower motor to move the hot air into the cabin of the car and through the defroster vents. If the blower motor is malfunctioning, the defroster will not work. Issues can range from a blown fuse to a bad blower speed controller. The blower motor itself can also go bad and need replacement.

Rear Defroster

  • Broken Grid: The most common issue with a rear defroster is physical damage to the heating grid running through the rear window. Damage can be caused by objects rubbing across the glass, which can break some of the grid wires. If the grid is damaged, it opens the circuit. The defroster will not function from the point of the break forward.

  • Broken Tabs: There are tabs on the sides of the rear defroster, which connect the defroster to the window and the circuit. One of these tabs acts as the positive and the other is the ground. If one of these comes off or fails, the defroster will no longer work.

  • Old Age: As defrosters age they can lose their conductivity which reduces their ability to conduct an electrical current. Repeated cleaning, the sun and objects rubbing over the grid will eventually wear the grid down and at some point may break it, rendering the defroster inoperable.

  • Window Tinting Damaged Defroster Lines: When window tinting is applied it comes into contact with the defroster grid and can bond to the heating elements. It is possible that defroster lines can be broken during installation or removal of a window tint.

What to expect:

A top-­rated mobile mechanic will come to your home or office to determine the source and cause of the defroster system issue, ​and will then provide a detailed inspection report that includes the scope and cost of the necessary repairs.

How important is this service?

A totally or partially defrosted windshield or rear window can seriously affect your visibility, leading to a very dangerous driving situation. Any issues with the defrosting system should be repaired immediately.

Fast and easy Defroster is not working Inspection service at your home or office.

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Meet some of our expert mechanics

Real customer reviews from owners like you.

164 reviews
Theodore
11 years of experience
Mechanic was excellent. Can someone please contact Debra Singleton at 510.872.8368.
2003 CHEVROLET IMPALA - CAR IS OVERHEATING INSPECTION
Want Theodore's expert advice? Ask your question now. Its free!
28 reviews
Joseph
13 years of experience
My car check engine light , VSC light and traction off lights came on ,I have a OBD scanner ,it gave me code P0128 ,That is thermostat issue .I checked with few mechanics ,their price range was between $150- $200 .I contacted yourmechanic.com ,they charge me just $77 labor ,I had my own parts ,Joseph came on my place,First time see him I feel like he is my best friend .He is so nice ,polite and professional ,very expert in his work,he installed the thermostat in about an hour and my problem is gone...I definitely will contact these guys again for all of my car repair needs in future...Thanks Joseph Russo
2004 TOYOTA AVALON - CAR THERMOSTAT REPLACEMENT
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27 reviews
Franky
21 years of experience
Very good knowledgeable guy. I would definitely use him again
2008 INFINITI FX35 - OIL CHANGE
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23 reviews
Genaro
8 years of experience
Genaro arrived about 10 minutes earlier and had parts ready for my request job on replacing the high pressure power steering hose. It took him about 1.5 hour to have the hose replaced, refilled and checked out. It has been great for last few days, no more leak. Great job.
2007 NISSAN MURANO - POWER STEERING PRESSURE HOSE REPLACEMENT
Want Genaro's expert advice? Ask your question now. Its free!
Get an instant quote for your car
Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
Get a quote
ServiceYourMechanic PriceShop/Dealer Price
Heating AC Inspection for 1967 Mercury Villager V8-7.0LYourMechanic Price$70.00Shop/Dealer Price$84.52 - $95.41
Heating AC Inspection for 2009 Chevrolet Express 3500 V8-6.0LYourMechanic Price$70.00Shop/Dealer Price$84.59 - $95.53
Heating AC Inspection for 1978 GMC K25 L6-4.8LYourMechanic Price$70.00Shop/Dealer Price$84.54 - $95.45
Heating AC Inspection for 1978 Chevrolet K10 V8-5.7LYourMechanic Price$70.00Shop/Dealer Price$84.56 - $95.49
Heating AC Inspection for 2017 Nissan Pathfinder V6-3.5LYourMechanic Price$70.00Shop/Dealer Price$84.53 - $95.43
Heating AC Inspection for 1976 Ford Torino V8-7.5LYourMechanic Price$70.00Shop/Dealer Price$84.52 - $95.40
Heating AC Inspection for 2004 BMW 645Ci V8-4.4LYourMechanic Price$70.00Shop/Dealer Price$95.56 - $114.73
Heating AC Inspection for 1966 GMC PB1000 Series L6-3.2LYourMechanic Price$70.00Shop/Dealer Price$84.59 - $95.52
Show example Defroster is not working Inspection prices

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