Winter is steadily approaching, and and it is also the time when many home and business owners reconsider their heating options. Preparation is key to welcoming the cold months of the year, and failing to check on your heating systems in time might cause a plethora of problems when you least want them. HVAC can be a viable heating option for the winter, but to ensure a steady and consistent heat output, thorough maintenance is a must.

Several issues may arise, but HVAC blowing out cold air only is among the most common. It’s difficult to explain to the clients the exact reason why their HVAC can’t blow hot air, but you will find in the latter text some of the possible reasons why HVAC usually fails to produce hot air and how to best resolve these issues.

In this article, we’ll discuss the most common causes of an HVAC system blowing cold air when set to hot. The article will also focus on how your customers can quickly resolve the issue so they can rest easy.

1. Table of Contents

   Toggle

   Filter Checkup

Air filters that are dirty and clogged are a common problem with HVAC units. In most cases, customers need to replace filters quarterly since dust, pollen, hair, and other particles accumulate quickly. Air filters can be found in return air vents, ductwork, or furnaces. Customers should contact an HVAC technician if they’re unsure.

Air can’t circulate through the HVAC unit if the filters are clogged. As a safety measure, furnaces and heat pumps are shut down when they overheat. You will no longer be able to circulate warm air in your home as a result.

Replacing dirty filters will extend the life of the HVAC system and ”fix a broken heater”.

1. Blocked Registers

A blocked register or vent can also lead to a heater breakdown, just as a clogged air filter can. It won’t be able to distribute warm air if it doesn’t have enough air to take in.

A vent may also be closed by mistake occasionally.

An obstructed vent may make one room feel cooler than the rest of the home. If that’s the case, there might be a ventilation problem.

1. It Takes Some Time to Warm up

A system that blows cold air is usually caused by a heater that hasn’t been given enough time to warm up properly. In the case of a newly installed system, it is likely that the system will not function at maximum capacity immediately after being turned on. Ten minutes should be enough to get the heater working normally, so it’s vital to wait it out patiently.

1. Low Refrigerant or Leaky Heat Pump

The heat pump won’t be able to heat a customer’s home adequately if it is low on refrigerant. Heat pumps need refrigerant, even during the cold months, to properly circulate cold air out of the room and consequently keep warm air inside.

Refrigerant may be the problem if the heat pump doesn’t blow warm air. There could be a shortage of refrigerant in the unit, so it needs to be recharged. Obviously, a customer cannot handle this on their own.

This problem can occur as a result of a refrigerant leak. It can also increase the humidity in the home, resulting in a cooler feeling. 

1. Issues With Thermostat

Air conditioning will not start until the room’s temperature reaches the selected level.

It is important to verify that the thermostat settings have not been changed. It should be set to automatic or heat. It is possible, however, that a thermostat will be set on cool instead of heat, resulting in the problem. The heater should start as soon as the thermostat is switched to heat.

Battery-powered thermostats should be checked and replaced if necessary.