you prolly dont give a shit but does any of you know of a tool to get back into an instagram account?? I was dumb forgot the password. I love any tips you can offer me.
@Jonathan Phoenix I really appreciate your reply. I found the site through google and im waiting for the hacking stuff atm. Seems to take a while so I will get back to you later when my account password hopefully is recovered.
Craig as always you do an outstanding job of explanation. I was forced to figure this stuff out on my own 35 years ago. Your are a valuable resource to the training in this industry. Thank you for all you do.
Nobody teaches this kind of work with so much detail as you do, sir; you are awesome. If you ever wanted to do these videos in Spanish just let me know as I could be of help in the translation process. Have a great weekend!
Why dont they make all the 24 v common wires blue? Like for instance in your heat pump unit, the 24 v common from the contactor to the defrost timer control board is brown, and the 24 v common from the defrost board to the blue thermostat wire is black. Lol. Just saying. Better know how to read the schematic guys. Lol.
Thank you for making this video. I'm not an hvac tech, but I do enjoy repairing my own stuff. I've been stuck for about a week now and its mid August in the deep south. Its humid and its almost 99 outside today, and this ac has been down for almost 3 weeks, so I was motivated to get this thing fixed, which I finally got everything wired up correctly this evening, thanks to this video. There are no other videos who show how exactly these Carrier heat pumps are wired. Again, thank you for making this video, its exactly what I needed. RU-vid University comes thru again.
I am an electrical contractor. I have specialized in controls for many years now but I never worked in HVAC controls. Lately I have been installing home genetators and needed to know how the heat strips worked so I could interrupt them under certain conditions during generator power. I appreciate this thorough review of the split unit. I feel more confident now that I have had this overview. Thank you for posting.
Mi hijo desconecto un viejo termostato de la marca day y night y úntalo un smart termostato y no lo puede hacer trabajar ni cool ni heat es sistema heat pump no puede conectar los alambres correctamente me puedes ayudar porque no trabaja nada más trabaja el circulation fan te lo agradecería que me ayudaras
Very well done. Personally I have found I prefer when the manufacturers energize the reversing valve in heating. If the reversing valve fails they still have emergency heat and in summer they still have a/c. It takes the pressure off me as far as how fast I need to respond. Seems today people become more irritable without cooling than without heat.
Very true. Also what good is it if the reversing valve fails and the unit can’t go into defrost? You will only have heat for a short time before the outdoor unit turns into a block of ice.
Man, I love your video!! I took HVAC for 2 years at my local college and they really did not explain it to me as well as u have in 19 minutes of your video, now, not saying they did not do a good job in teaching me but I feel like they only taught me the very minimal basics on HVAC. Very pleased with your video and I wish I could have had this training in school, thank you again!
Awesome video! I love it! Could you make a video on the older system without the control board, like an old Fedders model # BWRE018S7DA? I’d very much appreciate it. I run into dinosaur systems a lot here. These systems are the ones driving me crazy. I’m really learning a lot from your books. I’ve read it 3 times now and get more from it every time I read it. Thank you so much!
This was a VERY well explained video! Thank you very much. I have 15 years of install and always just had to follow diagrams for the wiring part. I am now a technician and have had to look up wiring HPs a few times. This finally set it in my mind... Now... Do duel fuel 😝 pretty please! Even though with this video now I understand how that would be best hooked up! Gas/propane furnace with HP and coil.
Is it possible to run a heat pump with a straight cool air handler? AH only has common, 12V, fan. I couldn’t b/c during heat, I have R G W, no Y. Goodman 5 ton. Edit: I think I just answered my own question. No (since I don’t know much) but I was just looking at my other AH that is designed for a heat pump, it has all the guts for sending Y compressor out. Mine don’t have all those wiring. My 4ton unit at work also has the same guts for a heat pump setup.
Thanks for your fantastic video and explanation. R wire is going to the outdoor unit. Could you please tell me what the purpose of this R wire is? The new heat pump outdoor unit requires only 4 wires ( O, W, Y and C wires). Thanks
Good show, after watching the show I thinking my reversing valve might not be working, I live on the west cost of Florida so it’s warm even at 3AM it might be 86 outside. My winter bill is about Twice the summer bill I be keeping an eye on it.
Dude ur explanation is awesome easy to follow and understand. U r very thorough and clear and quick n precise with ur explanation.. U didn't missed a thing. Loved it. Great job, possibly the best and most well informed vids I have ever seen..
Question, my ptac unit stop working because of faulty control board, it is an old unit and can't find the parts anymore however I really don't want to throw away the rest of its components, (condenser, fans, compressor, etc,), so I am thinking about getting rid of the control board and replace it with regular switches like, wall thermostat, contactor, heat sequencer relay for the heat strips, do you think is a good idea or not? because I'm only concern about the safety switches in the control board, but by adding some pressure switches and heater limit switches I'm thinking it will be ok, besides it would be a fun project
I’ve got a Trane and on my defrost board T1 is a brown wire and capped off! Two wires are hot going to the DB a red and orange and don’t have 24v going to my coil! Can push in by hand and compressor runs! Stuck like Chuck give it some more time tomorrow
i have normal 5 wires coming out of wall. why would air handler only have 3 wires (see 2 pictures of air handler above-wont let me attach:) and no wire on W heat terminals even though my heat worked fine when it was connected to honeywell thermostat…now changing to nest and heat is acting weird and smells gaseous for 5 min then heat turns off and stays off even though i have it set to a warmer temp. Any help greatly appreciated! can i send pics to you somehow? Single mom trying to get this working correctly while keeping my child dafe from fumes. I have the normal 5 wires coming into new thermostat but heating is not working properly like it was on older thermostat.
Can someone confirm? 24v is almost at the thermostat at terminal R and C. It does nothing until thermostat is turned on and its programming determines switch activation which sends voltage to air handler and heat pump controllers. So 24v at air handler transformer always powering thermostat where it sets until thermostat turned on and it switches the voltage to be applied elsewhere. correct?
I like the videos from you. I have one question. I have a Carrier Heat Pump system. In the thermostat, "C is OPTIONAL with Batteries" means I can leave the C terminal empty if the thermostat has batteries.?
So with a system like this if the reversing valve went bad would the unit be incapable of switching from heating to cooling, or would that only cause the defrost switching to fail?
So, in defrost mode, the heatpump sends refrigerant to the expansion valve that is located on the coil? If so, the air handle gonna blow cold air to the house ( in case the air handle doesn't have an electric heater)
Hi Craig question, I had a Custumer the want to install a heat pump, but he want to feed the outside unit from the tenant panel for AC and from the house panel for heat in other words he pay for heat the tenants pay for AC, so it going to be be two feed for same unit is anyway to interlocking those two feed using a rely , any idea if it possible?
So I guess the reversing valve fails in heating mode from what you said. which sense makes because you wouldn't want it to fail in cooling mode and freeze your house out lol. Awesome video gained some massive knowledge on this.
So the higher fan speed (in the presence of a time delay board with a y terminal) are wired into the same wire as the pressure switches connected to the defrost board in the condenser? That seems weird.
The red wire from xfmr, goes to power the thermostat. But I noticed that, it also goes to the heat pump. Maybe I missed it, but what does the red wire do at the heat pump.
I hope you see all the people praising you for this video and others. You were meant to teach. Probably anything, you break everything down to fractions and explain it thoroughly and efficiently. I work industrial maintenance and wish I could find videos like you produce for anything I work on lol
Thank you for your video. I checked there is only 13.5 VAC between Green and Red wires on the thermostat. Where should be the problem from the control board?
I am really glad it helped! Have you checked out our refrigerant charging and troubleshooting book? It is primarily on the refrigerant circuit and those components, thanks
Need advice, I have a common 3 Ton split system gas furnace. My compressor failed after 15 years of service. I recently purchased a new 3.5 Ton heat pump condenser as a replacement. I would like to take advantage of the heat pump technology and use the gas furnace as backup heat. My question revolves around the specifications of the new replacement evaporator coil. I noticed that most heat pump condenser units are married to an air handler with electric backup heat, instead of an evaporator coil box on a gas furnace. I understand that gas heat is possible as backup with a heat pump, but I'm confused about what modifications need to be made to the evaporator coil TXV. Please advise if there are special TXV for heat pump evaporator coil configuration and if there is something that is needs to be done to the furnace. Thanks Kevin
You are in good company for not knowing when a carrier heat pump will go into defrost. If it worked like you said, the heat pump would be in defrost mode every thirty, sixty, or ninety minutes of heat pump runtime if the defrost tstat happened to be closed at the end of that time period. How it actually works, is once the defrost tstat is closed, the timer starts. As long as the defrost tstat STAYS closed, the timing will continue. If, for example, the runtime with defrost tsat closed is forty minutes and jumper is set for sixty minutes, and defrost tstat opens at 65 degrees of coil temp, the timer resets to 0 minutes of runtime. So, its how long the defrost tstat has been ENERGIZED that determines defrost. And that time resets if not met.
I’m going through a 20 day hvac program right now and these videos are helpful to cement what I’m learning. Can’t thank you enough for the work you put into these.
Craig--excellent tutorial! I have almost exactly the setup you describe, air handler/gas furnace inside, and heat pump outside. I'm curious why the yellow compressor wire from TStat to Heat Pump (compressor on, whether reversing valve is activated or not for cold/hot) also needs to go to the air handler....presumably, increase fan speed when the heat pump is running? Does the heat pump require a faster circulating fan speed indoors than, say, emergency heat using just the white wire to the air handler heater?
Great videos as always!! I have an older York heat pump system. I replaced the thermostat recently, when unit is calling for heat, the blower motor turns on, however the outdoor unit does not kick on. Is the outdoor unit supposed to turn on also, when calling for heat?
Heat pumps are just starting to become popular in my area in Canada. Your explanation really helps me to understand the processes involved. It’s not quite as complicated to my brain anymore. 🙂
So thermostat OR defrost board can turn on electric heaters. Also thermostat OR defrost board can power the reversing valve. Is this correct ? Thanks for really great video
Very thorough and clearly explained. I have a Lennox heat pump system that has not been able to run the heat pump. The defrost board Y terminal seems to pull the thermostat's 24v signal to ground, effectively shorting it out. I checked the defrost board for continuity to ground on Y with no wire attached and it seems to be shorted. Is this something you've seen? Seems like the Y input on the board should not act like a ground. This system is only a little over a year old, with no corrosion issues. I'm thinking either the board is bad or maybe a pressure switch is grounding the circuit.
Very informative video. Living in an apt building, I have one question still. Hear clicking off and on quickly in my wall next to my air handler. Suspect faulty heatpump switch. They are on roof. Air handler cycling normally and cooling. If I shut off breakers for heatpump, furnace in breaker box and separate breaker on front of air handler and still hear noise between walls, does this mean I could behearing noise from a close apt by me and their unit? Would my heatpump be shut off by doing what I mentioned? Thanks, hope for an answer! Hate to deal with maintenance here, the are not very knowledgeable
my ac unit burn the 24v transformer and i bought a new one. every time that the compressor try to turn on the 24v voltage drops so badly that my ac controller back light dims down and a few seconds after it turns of the compressor. this only happens when every time i use the compressor either for heat or cooling when i use the heat coils everything runs fine. the only things that could be drawing so much power i think could be the contactor been the only thing that feeds of from the transformer at the time . any ideas?
or maybe i bought the wron 24v transformer and it doesn't have enough power for the contactor? its my first time ever working with ac units all i know is that there's a lot of voltage drop when the compressor tries to run. oh this is a very old unit without any electronic boards
I have to say this is the most comprehensive video I have seen. No more wasted time watching some yo yo babbling on. This man knows his stuff. I had a HVAC cert in FL but we didn't do heating. I put in a new heat pump and redid all the wiring. Honeywell 9000 thermostat. Have been having problems with this heating since it was installed. ODT has me messed up. This showed the correct wiring and that will solve my problem. Last tech that worked on my system while I lived in FL (this home is in SC) messed up the wiring and cut and spliced things up to where I wasn't sure what was correct. Now this video has solved that issue. One wire was in the wrong place and had disabled my Aux/E from working properly. Thanks for you awesome knowledge and help.
Liked your video but this unit is a very complex system for anyone ( average joe) to follow. Lost me at the heat pump wiring. Start simple and add to it.
So I'm a building engineer and I was wondering if they make a reversing in valve with a hot gas bypass so you don't have to worry about switching back into cool mode just for defrost the condenser. Because I know our chillers have it at my work and it just uses it to put a load back on the chiller.
Hello. Watched the video to the end. Good information. So we had a new 95% LP furnace put in along with a heat pump installed. So everything works with the heat but when you turn the thermostat to cool it blows out hot air. The company has been back out several times and they are not sure but they think it is the new thermostat they installed. They manually reversed the valve and we got cold air. All wires in and out are getting continuity but when switched to cool the thermostat is not sending a 24 Volt signal to the heat pump to turn it on for cooling. The outside unit works fine for heat. Everything is brand new. Any thoughts or help would be greatly appreciated. Thank you
We have a problem on our system that was installed six years ago, where the unit will not transition between cooling and heat pump with seasonal change, unless I power cycle the circuit breakers and remove the thermostat batteries. Once I reconnect the thermostat, the system will begin cooling again, or heating, depending on the switch position. I have to do this every time I want to change between heating and cooling. Why is this happening? The first couple times this happened I called the installer who came out and charged me a service fee to reset the system. I got tired of paying the service fee, so I do it myself now. It seems like something is wrong with the reversing valve or how the system controls that. Can you help?
I've run into some units where only 2 out of the 3 heat strips in it will energize in emergency heat mode. Is that because the 3rd heat strip is designated for defrost only? Or should all 3 be energized in emergency heat mode?
It's a great video for chasing wires. Good job and thank you! I'm troubleshooting an issue.. My carrier heat pump was replaced last summer. I turned on my heater and it worked one night and now the air handler isn't coming on any More. But the heat pump is coming on. They changed out my thermostat when they changed the outdoor heat pump. The batteries are good in the thermostat. I also checked the little fuse in the circuit board and it's good. What could have happened?
