thermostat wiring

Top 5 HVAC Electrical Problems

By Published On: February 24, 2019

Do you keep blowing furnace fuses? Don’t know why? Well, there could be many reasons why. Electrical problems are one of the biggest reasons we are getting calls from customers. Here are the top causes of electrical issues we see most often.

Loose Wires

Through natural vibrations caused by the running of your HVAC unit, wires can shake loose. Eventually, a wire becomes loose enough it causes a short, leaving you with a furnace that’s not working properly. Locating these wires can be difficult but more often than not, once found, it’s an easy repair. If secured correctly during repair, it’s unlikely to happen again.

Clogged Furnace Filter

Believe it or not, this is hands down one of the main reasons we see electrical issues. If you have not cleaned or changed your furnace filter in quite some time. Then all that built up of dust and debris is getting into your blower motor. This can cause the blower motor to overheat and eventually blow fuses.

Changing or cleaning your filters regularly will help avoid this problem. However, if you notice this problem, it is relatively easy to fix. All you need to do is clean or replace the filter, clean the blower motor and then replace the blown fuse. To ensure this problem is fixedcorrectly, consult an expert to inspect the HVAC unit.

Wrong or Dirty Fuse

If you haven’t had your furnace serviced/cleaned in a few years, the parts will be dirty. When an HVAC fuse gets covered in grime, it may no longer connect sufficiently and can fail.

Another common fuse related issue is not having the correct fuse. When an inexperienced tech or individuals replace fuses, they often use the wrong size. While this may initially work, it will eventually lead to issues. When a connection is not strong enough and the capability of the fuse is not adequate to the workload needed, this will ultimately cause fuses to blow.

Bad Blower Motor

A failing blower motor can also cause fuses to blow. The strain causes the motor to pull to much power, which will resort in a short. If this is the problem, a technician will need to service the unit and inspect further to ensure everything is operating correctly.

Electric Furnace Thermostat Wiring

The furnace’s control board has its own fuse that protects from overheating. If an inexperienced tech is working on your furnace, they could move wires causing them to come into contact with the furnace’s wire frame. This may cause them to short and blow the fuse on the furnace board.

Electrical issues are a serious matter and should be handled by experts. Russell Heating and Air is the best bet in Cherokee County (and surrounding areas) for all HVAC problems! Call us today if you are experiencing any of the mentioned issues.

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Written by : Mitchell Cobb
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