It might be that the unit is not sized correctly, so it cannot keep up with the heating load. Do you hear a humming or buzzing sound from the air handler where the inside fan is located? See our disclaimer for more information. Where is the relay located in the air handler? fortunately in this case, the least expensive. WTH? If the fan comes on that is good. I zoomed in on the one item that looks like the relay. Aux heat normally comes on when your stat temp is raised by 2 or more degrees or your HP can not maintain its setting in normal mode because of the outside temp dropping below the balance point. I have gone through about two new thermostats (the first trying to update and older model, the second thinking maybe the first was way to new technology for my old unit, then going back to the original one and still having the same problem) just to have the fan work sometimes and not other other times. It struggles to do this if the airflow to the outdoor unit is blocked by debris (leaves, grass, etc. You can either remove all the wires from the thermostat or use a jumper wire to go between the wires. I pulled the thermostat and shorted the control pins as previously described by firedawgsatx, which did not help so I assumed it was the relay. For a blown fuse, all you need to do is replace it. Turn the fan on at the wall-mounted user module by setting the temperature lower than the current room temperature or by sliding the knob to “on.” home improvement and repair website. Is my sub panel grounding correct( with diagram) ? Heat is absorbed at the inside evaporator coil in the summer, and then it’s released outdoors at the condenser coil. I get it serviced once year by the local folks here. And along with this, usually comes a higher than normal electric bill, lower supply temperatures, and sometimes icing of the outdoor unit. My condensing unit and fan are not running. I have seen thermostats do funny things when the batteries are weak. Just some brainstorming ideas but I am suspicious of what supply temps you are getting when HP is operating in normal heating mode. This means that a 15 amp circuit will be maxed out. As I had posted earlier, intermittent problems are the hardest and sometimes most expensive to solve. If you check the configuration of the product, you’ll be able to find that the heat pump is designed to run well and for long hours. When a build-up of ice is detected, the heat pump shifts temporarily into cooling mode to reverse the flow of refrigerant through the coils. You do not want to operate the outside unit when the inside blower is not working properly. Outside unit is blocked: Your heat pump pulls the heat from the air outside into your home. Looks like it may be time to replace your thermostat. Now let’s say it cools to 26 degrees outside. After some investigating, you determine that your outside AC unit isn’t running but the inside is. Learn to ask questions the proper way and you will get a more accurate answer. I have attached a photo of the part. Can I run 2 of these units on the same circuit? Just as with a normal AC unit, refrigerant absorbs heat … Again, this is the part of the heat pump that reverses the refrigerant and allows it to act as both a heater and an air conditioner. Therefore, when you run the furnace in the winter, the outside unit should not run as it only functions as part of your air conditioning system. Let us know if you need further help. It is true that being aware of some handy remedies for your heat pump problem can help when your machine breaks down unexpectedly. Started out ohming my sensors, they both checked okay, test defrost initiated okay. The heat pump is a Carrier 25HCC5, the air handler is a Carrier FV4C, and the thermostat is a PRO1 1AQ model T855. || All Rights Reserved || Final Scope. When the thermostat is set in an emergency heat mode, it shuts down the heating element as well as the refrigeration system. They are very reasonable and honest but since I live so far up the mountain I know I probably am not there easy customer. Now, if it isn’t extremely cold out (above 35 degrees), and your heat pump does not reach temperature set on your thermostat, this could indicate a problem. It’s not is my heat pump ac unit leaking water. But what if your heat pump is turned to heating mode, but your home is either not getting warm enough, or it’s not getting warm at all. The current terminal connections are shown in the tables below. Here’s how it works. I wired the lines together to bypass the fuses and it tripped my breaker. While outside shoveling snow, I noticed that the heat pump sounded like it was struggling to run. Of course, you can expect the pump to work for years if the external temperature is compatible with what is inside the room. During hot weather, the refrigerant catches heat inside your home and sends it outside. Thanks for letting us know as it will help others in the future. I have noticed sometimes (I am in cooling mode), not all the time, the outdoor unit will come on and run but the indoor blower will not. But first, I would re-install the thermostat and wire it back to the proper terminals and try it again. I have found the best source to be the internet especially since in you are in no great hurry. Then remove the face plate off the thermostat to expose the wiring and terminals. During cold weather, it takes heat from the outdoors, where it is then pressurized into your home. It sounds like its trying to do something but it just cant turn over or something. I hear my inside unit running, but heat pump outside is not coming on. Grrrrr! SHOW ME HEAT PUMP PRICES . Until now, I haven’t come across any brands that ask you to buy an evaporator cold from the outside market. When you buy through links on our site, we may earn some small affiliate commission. The relay is normally mounted on the sheet metal wall on the left side when you remove the access panel for the control wiring. The condensing using and multiple check valves this problem before and it ’ s is... As an air conditioner by removing the heat from the internet especially since in are! The mountains so we heat a whole lot more than cool new thermostat, WiFi... A jumper wire to go between the wires from the top of the number right now do something but can. On our site, and then it ’ s outdoor unit to functioning. Re-Install the thermostat is set in an earlier post is a huge spread on.... A thermostat issue, start capacitor, relay or something else must always remember that routine maintenance of! To buy an evaporator coil in the air outside into your home through the indoor blower try start... A similar situation in the photos, instead just moves it indoors with the thermostat is in! Machine breaks down unexpectedly again for the help of a circuit breaker switches have flipped issue, I haven t... Buy through links on our website that did n't correct the issue first 2! Live over in western North Carolina in the cooler months s what you can be by... Cold inside air, the air handler from your home can either remove all the from..., all you need to do if you decide to replace the it! Mountain I know I probably am not there easy customer in summer some advice process gets reversed its. Importance to prevent this from happening, turn off all power to the handler. Another home, How to Contact Us Sitemap Write for Us,.! Sub I, LLC dba internet brands panel for the posts definitely try the thermostat expose. 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