Dirty Air Handler Blower Fan

Check for a dirty air handler blower fan.

Dirty air handler blower fan.

Similar to a clogged filter dirt on the blades of the air handler fan will decrease cold airflow over the heat exchangers resulting in the same blower on blower off pattern. If you notice your gas furnace is short cycling turning on and off frequently the culprit may be a dirty blower wheel. A dirty filter restricts the air flow into your hvac systems air handler. A dirty air filter is the 1 reason for hvac system failure.

Dirty a c or heat pump blower units dirt blocked air conditioner air handler fans we also discuss how to improve indoor air quality by installing a cascaded air filter system at the air conditioning or heating system air handler to provide optimal air particle filtration for people with asthma allergies or indoor mold or other iaq concerns. So if your air handler looks like the one below try wiping the blades carefully with a dry towel or toothbrush. Possible cause dirty air conditioner blower the most common root problem underlying a frozen air conditioner is a dirty air conditioner blower that s clogged and congested with dust and dirt. This restricted air flow places additional strain on the air handler fan motor and could over time burn out the motor and cause your system to overheat and ultimately fail.

If your blower motor is dirty or has a bad capacitor you can call in an hvac technician to fix the problem. When these air exchanges can not happen successfully because a dirty blower wheel is impairing air flow your system will fail. It could be a bad relay control board run capacitor or the blower motor itself. A dirty blower wheel will also contribute to a high electric bill.

Damage caused by a dirty blower can be costly to fix but can be prevented too. The next most common problem that can occur with an air handler is a failure of a blower motor whether it be the blower motor or something else that causes the blower motor to fail. Luckily this is one of the easiest problems to repair. Having a dirty blower wheel will make your hvac system work harder and if not addressed eventually cause your ac system to stop working.

On the other hand if your motor is reaching the end of its service life you should start looking for a replacement motor. This happens most often in old units that have not been receiving proper maintenance.