Best video and explanation out there! Thank you for such a detailed video! You are an amazing teacher! I came across your video because my heat pump went to defrost mode. I saw steam and all but the noise kept getting worse and worse. I saw my discharge temp go up to 250 degrees which I hear is never good past 225. They say 225 keeps compressor alive. I think my charge was a little low because it went into defrost at like 46 degrees which was weird. No frost noticed on outdoor coils but I saw steam and a little water under the condenser though.
It could have been that it was low on Freon. But it should only be in defrost for 10 minutes maximum. So having the pressure and the discharge like that should not affect it that much. It is odd that at 46°. It went into defrost. You could also have a bad defrost thermostat and if it failed in the close position, which they do sometimes, then no matter what the outdoor temperature is it will still go into defrost. So make sure you check that defrost thermostat operation. And thank you for your kind words! I hope this helps and thank you for watching.
I just want to say that I’m very grateful with you because you’ve been teaching me far more than other people it’s been trying to teach me you’re so clear on your explanations and I want to thank you thank you very much you’re a big big help
Thanks so much Mr. Aurio for the grate work you are doing for us, sir kindly could please also put for us video on the Refers how they operate and explain for me the functions of many values on the refer.
On heat pumps, it is a matter of time and temperature. So it is every 30, 60, or 90 minutes that it will check to see if it needs to go into defrost. The way it knows if it needs to go into defrost is because of the defrost thermostat, this is where the temperature comes in. The defrost thermostat is not closed because the temperature of the coil is so cold then it will just keep running in the heating mode. So when both time and temperature are calling for it, then it will go into defrost for, no longer than 10 minutes. If things are working properly and the charge is correct then the heat pump should come out of defrost within three minutes. This is how the defrost works, again because of time and temperature. I hope this answer answered your question, thank you for watching.
Thank you for the question. I'm not sure if I understand but I think you were asking where to install the defrost thermostat? Typically that would be installed at the outlet of the coil as the refrigerant is leaving the coil in the defrost mode/cooling mode. You want to monitor the temperature of the refrigerant leaving the coil, because when the temperature goes up you know that the ice is gone, and that is when you want the unit to come out of defrost. In other words you install it at the outlet of the coil and you do that to make sure that the temperature is high enough so that the ice is gone or melted. I hope this helps!
@@AirConAcademy Thank you for your reply, I understand this point. But for more clarification I saw different locations for the defrost switch, some models used it on the first loop from the bottom and other from second or third loop from the bottom. My question is there any big different between those locations or we can install it on any loop?
@@mohamedazzam1352 OHHHHH ok I understand!!! Yes, on some of these units the manufacture will tell you exactly where it should go. No matter what any instructor or teacher tells you in a classroom, it is always best to go with what the manufacturer suggests. The manufacturer designed the unit and some engineer knows exactly where the desired temperature is going to be. I wish I could give you a better explanation but as a structures we don't know all of the requirements for every single unit out in the field. I hope this helped and I wish I could've given you a better answer.
The temperature in the house would drop and when it drops the emergency heat would come on to heat the house, or the space. If the unit is not going into defrost then the ice will just keep building up. Check the defrost circuit and see if it is the timer, the circuitboard or the defrost thermostat that has failed.
Best video and explanation out there! Thank you for such a detailed video! You are an amazing teacher! I came across your video because my heat pump went to defrost mode. I saw steam and all but the noise kept getting worse and worse. I saw my discharge temp go up to 250 degrees which I hear is never good past 225. They say 225 keeps compressor alive. I think my charge was a little low because it went into defrost at like 46 degrees which was weird. No frost noticed on outdoor coils but I saw steam and a little water under the condenser though.
It could have been that it was low on Freon. But it should only be in defrost for 10 minutes maximum. So having the pressure and the discharge like that should not affect it that much. It is odd that at 46°. It went into defrost. You could also have a bad defrost thermostat and if it failed in the close position, which they do sometimes, then no matter what the outdoor temperature is it will still go into defrost. So make sure you check that defrost thermostat operation. And thank you for your kind words! I hope this helps and thank you for watching.
Thank you, that is the simplest and the easiest description of the all time how the heat pump is working.
Thank you!!! keep looking I will have more soon and if you have any suggestions Please let me know!!!
I just want to say that I’m very grateful with you because you’ve been teaching me far more than other people it’s been trying to teach me you’re so clear on your explanations and I want to thank you thank you very much you’re a big big help
I am so glad to hear that! That is one of the reasons I do this to help you guys out there. Keep learning and thank you for watching!
Thanks so much Mr. Aurio for the grate work you are doing for us, sir kindly could please also put for us video on the Refers how they operate and explain for me the functions of many values on the refer.
Thank you for the request I just made a note of it and I will see what I can do! Thank you and thank you for watching!
Welcome back Boaz Yishai from Israel
Yes, please make more videos about the defrost board! I need to learn a lot more about heat pumps.
I will try to get to those as soon as I get a chance. Thank you for your suggestion! And thank you for watching!
You do a really great job at explaining this stuff. Hope people find your channel. You should be getting a lot more views.
Thank you!!! I hope it helps you guys out there!!! and honestly I hope to eventually make some money. lol
Thanks Julio great video as usual
Hello Sir, how does the system knows when to change it to defrost mode. Thank you
On heat pumps, it is a matter of time and temperature. So it is every 30, 60, or 90 minutes that it will check to see if it needs to go into defrost. The way it knows if it needs to go into defrost is because of the defrost thermostat, this is where the temperature comes in. The defrost thermostat is not closed because the temperature of the coil is so cold then it will just keep running in the heating mode. So when both time and temperature are calling for it, then it will go into defrost for, no longer than 10 minutes. If things are working properly and the charge is correct then the heat pump should come out of defrost within three minutes. This is how the defrost works, again because of time and temperature. I hope this answer answered your question, thank you for watching.
Nice explanation
Thank you!!!!
Could you please tell me what is best loop to install defrost switch and why?
Thank you for the question. I'm not sure if I understand but I think you were asking where to install the defrost thermostat? Typically that would be installed at the outlet of the coil as the refrigerant is leaving the coil in the defrost mode/cooling mode. You want to monitor the temperature of the refrigerant leaving the coil, because when the temperature goes up you know that the ice is gone, and that is when you want the unit to come out of defrost. In other words you install it at the outlet of the coil and you do that to make sure that the temperature is high enough so that the ice is gone or melted. I hope this helps!
@@AirConAcademy Thank you for your reply, I understand this point. But for more clarification I saw different locations for the defrost switch, some models used it on the first loop from the bottom and other from second or third loop from the bottom.
My question is there any big different between those locations or we can install it on any loop?
@@mohamedazzam1352 OHHHHH ok I understand!!! Yes, on some of these units the manufacture will tell you exactly where it should go. No matter what any instructor or teacher tells you in a classroom, it is always best to go with what the manufacturer suggests. The manufacturer designed the unit and some engineer knows exactly where the desired temperature is going to be. I wish I could give you a better explanation but as a structures we don't know all of the requirements for every single unit out in the field. I hope this helped and I wish I could've given you a better answer.
what happens when the defrost cycle never kicks in and the outside unit turns into a block of ice? Does the emergency heat stay on all the time?
The temperature in the house would drop and when it drops the emergency heat would come on to heat the house, or the space. If the unit is not going into defrost then the ice will just keep building up. Check the defrost circuit and see if it is the timer, the circuitboard or the defrost thermostat that has failed.
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Thank you!!!
Thank you,
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Men u awesome
Sir, yellow colour is not visible... Use blue is better than yellow... 👍