2004 Accord No Heat


Why is my heat not working in my Honda Accord?

The most common reasons a Honda Accord heater isn’t working are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor.

Why is my Honda Accord blowing cold air?

There are a number of reasons why your car heater could be blowing cold air: Broken thermostat. Car heater core issues. Low coolant levels.

How do you unclog a heater core?

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I'm going to show you how you can take off the hoses that go to the heater core attach this to the water hose blast it out and within a few seconds your heater core will be unclogged.

How do I fix no heat?

Heater Not Working? 7 Troubleshooting Tips:

  1. Check that your thermostat is set to “heat.” …
  2. Change the filter. …
  3. Make sure the gas is on. …
  4. Clear the chimney exhaust flue. …
  5. Clean away leaves and debris from exhaust vents. …
  6. Flush out the drain lines. …
  7. Check for blocked ducts restricting airflow.


What happens when blower motor goes bad?

If the blower motor is completely bad, then you’ll have no airflow at all. Strange sounds coming from blower. Blower motors can make all kinds of sounds, depending on what the issue is. Vibrations, grinding, and high pitched-noises are some of the sounds a blower can make if it’s going bad.

How much does it cost to fix a heater core?

The total cost of parts and labor will range between $800 and $1,000 to have your heater core fixed by a professional. Labor costs vary, so call ahead and get a quote from multiple repair shops. If you fix the heater yourself, you’ll only have to pay for the cost of a new heater core which runs between $100 and $300.

Does coolant go to heater core?

The heater core has tubes that circulate hot engine coolant through them before the coolant is returned to the radiator. Air blows over the hot coolant to warm it before it’s blown through your vehicle’s vents.

How do I turn on the heat in my Honda Accord?

On the left side and right side, you will see a set of red and blue arrows. These arrows alter the temperature on the passenger and driver sides of the car. By pressing the red, upward-facing arrow you will turn on the heat to your desired temperature as shown on the display to the right.

Where is the thermostat on a 2005 Honda Accord?

The thermostat is located on the engine block facing the front of the vehicle, under the intake plenum. There’s three 10mm bolts that need to be removed, along with the clip for the lower radiator hose.

Why is my heater not blowing hot air in my car?

Faulty heater cores and low or contaminated coolant levels often come hand in hand, and both issues may lead to your engine overheating and your heater not blowing hot air.

Why is my heat running but not heating?

Dirty filters are the most common cause of furnace problems. Dust and dirt restrict airflow—and if the filter gets too clogged, the heat exchanger will overheat and shut off too quickly, and your house won’t warm up. If the blower is running but no heat is coming out, replace the filter.

Can a blown fuse cause heater not to work?

Faulty Wiring or Blown Fuses



Similar to your broken HVAC controls, your car’s wiring could be broken or have a short in it. This would mean the heater isn’t triggered when the driver commands it to function.

How do I know if my heater fuse is blown?

Once you’ve located the fuse, check its wires to see if they’re broken or look for signs of discoloration or cloudiness. If so, you have a blown fuse that will have to be replaced. You can also use a multimeter to check if the fuse is blown.

Why is my heat blowing cold air?

A clogged filter is one of the leading reasons for a heater blowing cold air. But even if you swap the air filter with a brand new one, dirt and debris can still be found within the unit. This could eventually lead to overheating. If your furnace looks pretty dirty, call an HVAC provider for a professional clean.

What fuse controls the heat in a car?

The blower fuse is a 40 amp fuse located in the engine compartment’s fuse box. The blower blower is controlled by the blower controller/resistor next to blower in the housing.