Lasko Heater Blowing Cold [How to Fix]

Is your Lasko heater blowing cold air instead of hot air? Then, you might be wondering how to resolve the problem.

Lasko Space Heater

If your Lasko heater is blowing cold air, a quick way to fix this issue is to power cycle the heater or clean its air filters. You should also check your thermostat settings to ensure that you’ve set it to the correct temperature.

I’ll show you how to apply these solutions in the piece below.

How to Fix ‘Lasko Heater Blowing Cold’

Power Cycle Your Heater

If you’ve been using your Lasko heater for several years, the heater may blow cold air, or develop other problems. These issues indicate that the device is nearing the end of its lifetime.

Luckily, you don’t have to change the heater yet. Power cycling the heater may be enough to get the device back in order.

Follow these steps to power cycle your heater:

  • Unplug your Lasko heater from power.
  • Leave the device unplugged for 15-30 seconds.
  • Then, connect the heater back to power.

Now, check if the heater is still blowing cold air. If it is, move on to the next step.

Increase the Temperature on Your Thermostat’s Temperature

Another reason why your Lasko heater may blow cool air is because your thermostat is set to below room temperature. Most heaters go off when the thermostat’s temperature settings are low. But the Lasko heater has a fan that automatically starts blowing cool air when you reduce your temperature settings.

Increase the temperature settings on your thermostat and wait for the heater to blow hot air. If the heater keeps releasing cool air after this, try the next tip.

Change Your Thermostat’s Battery

As time passes, your thermostat’s battery will weaken, thus making the device lose power. Without enough power, the thermostat won’t be able to influence the heater to switch from its cooling settings back to the Heat function.

As a result, your heater will keep blowing cold air. The solution to this issue is to replace your thermostat’s battery. If you suspect that the battery is due for a replacement, remove it and insert a new one into the thermostat.

Your Lasko heater should start blowing warm air. However, if you can still sense cold air coming out of the heater, continue to the next tip.

Fix Loose Wiring on Your Thermostat

Like bad batteries, loose wires steal from a thermostat’s power and affect the ability of the thermostat to control your HVAC system.

If your Lasko heater is blowing cold air, study the wires on the thermostat carefully. If they seem loose, hire an electrician to inspect and fix them.

Clean the Air Filters in Your Heater

If your Lasko heater is working, but your room still feels so cold, the air filters in the heater might be clogged.

Before air moves from the Lasko heater to your room, the air passes through air filters that remove dirt from it. Over time, the filters will accumulate all the debris they have extracted. This clogs the air filters, making it difficult for air to penetrate them.

Due to this issue, you might think that the cold air is coming from your heater when the device isn’t even blowing air. You can resolve this problem by cleaning the air filters in the heater.

Turn off your heater and wipe its surface. Then, use a duster to clean the inner parts of the heater.

Once you’ve cleaned your heater’s air filters, check if the heater is blowing hot air. If the air in your room still feels cold after cleaning the filters, move on to the next tip.

Related: How to Fix lasko Heater Power Problems.

Clean Your Duct System

The duct system transports air from your HVAC system into and around your rooms. As air passes through the ducts, dirt infiltrates the system. After a while, the accumulated dirt will block your ducts. This prevents the hot air coming out of your heater from being distributed evenly across your rooms.

When the thermostat detects that some of your rooms are still cool, it will force your Lasko heater to blow hot air until the device overheats. To avoid an explosion, the protection switch on the heater will shut off the device, leaving your home completely cold.

If your Lasko heater blows cold air after you’ve cleaned its air filters, your ducts are most likely clogged. Ask a professional to open up your ducts and clean the system. If the specialist notices a leak in the ducts, they’ll also fix it.

Your Lasko heater should blow hot air now. But if you still feel cold air coming out of the heater, check out the next tip.

Clean Your Flame Sensor

A flame sensor is a safety device that detects whether the furnace is producing a flame. Without this flame, the unburned gas in the furnace will escape into the open air and cause serious damage to your home. To prevent this disaster, the flame sensor automatically shuts off the furnace when it doesn’t find a flame in the system.

At first, the flame sensor works properly. But over time, the sensor may get clogged with dirt and lose its efficiency. A dirty flame sensor may turn off your furnace even if it constantly produces flames.

An inactive furnace is bad news for your Lasko heater. This is because the heater sometimes relies on the furnace to produce hot air. The heater only adjusts the temperature of the air to your preference.

If the furnace is off, the heater may not release warm air. This might make you wrongly assume that your heater is blowing cold air.

To fix this issue, you’ll need to clean the flame sensor in your furnace. Once your flame sensor is clean, your furnace should come back on, and your Lasko heater should start blowing hot air.

If that isn’t the case, you should try the next tip.

Repair Electrical Issues in the Heater

Sometimes, the inability of a Lasko heater to blow hot air may have nothing to do with improper settings or dirt. Rather, it could point to electrical issues in the heater. The usual culprit in this case is a blown circuit or a faulty heater coil.

If you aren’t a technician, don’t try to inspect or fix the heater yourself. If you do, you may damage the heater completely. Instead, hire a professional to detect and repair the electrical issues in your heater.

Replace Your Heater

If your Lasko heater still blows cold air after you’ve tried all the tips above, the heater is most likely faulty. Get a new heater to keep enjoying warmth and comfort in your home.

Wrapping Up

If you apply the solutions above, you’ll be able to fix your Lasko heater. Look out for the related issues carefully and contact a technician when necessary.