It’s easy to take your heating and air conditioning system for granted. You expect it always to be ready when the weather changes — all you need to do is switch it on and set the thermostat. However, they do break down sometimes. Knowing the symptoms of trouble can help to keep a minor problem from becoming worse in your home. Here Are The 5 Signs That Your HVAC Needs a Checkup Poor Cooling or Heating It’s easy to tell if your air conditioner or heating system stops working entirely.