Sometimes furnaces are perfectly alright as far as hardware is concerned. However, they still exhibit issues simply because there are faulty electronics to consider. One of the biggest culprits of heat pump issues is the thermostat. A slight problem with the thermostat can ground the entire HVAC unit. Unfortunately, most homeowners fail to realize when the thermostat is the problem. They are either ignorant or unsure if it is broken. You do not have to be an HVAC enthusiast to know when the system is broken. Fortunately, there are simple tell-tell signs that will guide your decision. The first sign to know that the heating and cooling unit may not be the problem, but the thermostat will be an unresponsive thermostat. When pressing the buttons, it shows no power. Two things are at play when this happens. It is either your thermostat that requires replacement because it is broken, or the batteries have run out and need to be changed. When unsure of what the issue could be, try by replacing the batteries first. If the power comes back on, then you are sorted. If it remains unresponsive, then the issue is more profound than you can fix. Contact your HVAC technician for a professional assessment and fixing. The other standard indicator of a thermostat that needs fixing is that the cooling and heating system goes on continuously. Usually, it needs to shut off automatically and come back on without any physical interference. If it runs always, then this is a sign that it is wrongly calibrated or a mishap with the wiring. Either way, professional HVAC service providers are needed to help out.