I’ll try to make sure I post a video if I can zero in on exactly what was causing this.

You do a really good job explaining what your doing and thank you very much for all the tips. Keep the videos coming 😀

Great job diagnosing the issue.

Awesome video I learn so much watching them thank you!!

11:00 my OAT sensor was faulty/ I had both Fault Lights on hard. ...yessss the bypass! it was enough to get it going until the Board and Sensor Kit from ProTech can be ordered (in 5 days) ...your videos are a Goldmine to the Trained Eye 🐉

Thank you for the video,I mostly work on Goodman and Carrier,still getting knowledge from people like you.. this video is awesome,so many tips if you pay attention(I watched the video multiple times):))).. thank you sir and keep posting !.. you have one more subscriber !

Hey man just wanted to say thanks saved me a trip from the hvac guy.

Wow, those refrigerant measuring instruments that connect to your phone are interesting. Everything seems so much more compact than it used to be.

Sand the tubing before putting on the clamps....Good tip on the LPS with the meter ! Possibly intermittent indoor ECM module/ no start.

Ran into tho exact same problem however it was not a bad board…the txv in the condenser had a restriction and when the customer put it into heat it pulled a vacuum and tripped the low pressure switch enough times to cause the lockout

Nice job ... Thx for sharing ...

I get these calls all the time after a storm but its always high pressure lockout. I install a surge protector on the air handle and one on condenser. Does the trick.

on Wednesday I had a condenser unit that would not start. The code was locked out on pressure. I went to touch the compressor but it was cold so I put on gauges and the charge pressure seemed ok. I was going to test the cap when I notice my common from the board was burned out. I had it running for 15 minutes and took an amp reading and called a day.

The board, pressure switch, depending on the type thermostat loosing G will cause that, the air handler circuit board loosing G and a failing evaporator motor/and or capacitor if it has one. And also bad relays for the evaporator motor if it’s a PSC motor and running off a relay instead of a board if it’s an older unit. But most have all of course switched to circuit boards long ago. But if it’s an indoor issue with the blower motor or it cutting off the coil of course would be iced up. And there are other issues that will cause that problem as well but they are rare. I’ve had some to drive me nuts before i found it. Expansion valves shutting closed are a rare occurrence but will cause that.

That gurgling noise is driving me crazy!!!!

could be moisture,but most likely lps,you can put temporary lps at service port.tricky one.

I have this problem a lot high pressure always has me out but pressures are good

Been on several with same issue. You can install a bypass timer (ICM 175B) for the low pressure switch .

I have the rheem 13pjl24a01… at the top of your board I notice your red is connected above brown… I don’t have a red plugged in but have a rogue red wire that looks out of place… should a red wire be connected? What I thought was a bad capacitor, still didn’t solve the issue, just hums with no motion.

Lennox does the same. I always change the defrost control board , and seems to take care of problem so far

Nice work

THE JAMES BOND OF HVAC.

I'm going with a squirrely x13 or that stupid blower relay they use that's like the Goodman relay. I've replaced a couple of those. There was water gurgling in the drain trap, that could have possibly been from ice melt? On the flip side of that, I had a unit freeze the entire coil into a block of ice and the entire line set and all the way out to the compressor and the unit was still running and did not trip low pressure. 😵😵😵

I have this same problem. Low pressure switch open on a rp1436aj1na. I'm hoping it's something simple. We just had the condenser coil replaced last winter due to ice damage, and im hoping it didn't freeze up again and grenade itself.

Curious as to what the problem was. Mine has started giving me the LP lockout.

The carrier infinity communicating defrost board is the most full of enigmas

what did you do to the pc board to make it start up? I saw you touch and jumped something up top, but ur not saying what u did. This is great info to start up a unit when it is in lock out mode. What did you jumped?

Hazah!!! For anyone looking after you clear your fault (changing filters etc) jump the two pins at top left of your board to reset it and see if it trips again.

Could you say what terminals ur testing, what reading ur getting, is the unit on or off as you make ur tests, what ur expecting etc etc, it would be a great help. thnx.

Thanks for the video. So LPS, defrost Board, Blower failure, TXV is our options lol. Let us know what happens. I’m leaning toward blower. I’d bypass the switch and board and if it actually freezes up than it’s gotta be the blower. TXV’s usually don’t unstick. If a while passes with no issues than at least we know the issue 🤪 by that time you’ve spent too long lol hate intermittent issues!

I have found 2 unit do that 1st one I just ran pigtail from common to one of contactor ran fine customer never called me back on replacing defrost board either he called someone else or its still running thats been 4yrs .

The rheems are very sensitive to power glitches. A lot of times you never even know the power even glitched but it will definitely lock that board out. I have to do this to mine at least twice a year, even when it was brand new.

Possible issue with the x13 blower intermittently cutting out causing the low pressure? I hate intermittent issues like that

These Ruud/Rheem units are very problematic when it comes to the defrost board. They’re constantly going on high or low pressure lockouts for no apparent reason.

I'd prob just bypass low pressure switch. Does it again it's definitely the board. Come back out and frozen or not cooling. Then it's blower or txv...very rare issue would be a closed evap circuit. Slowly freezes up after day or two.

I'm getting a high pressure lock out, pressures look good. Unit (HP) will start up and shut off in 30 seconds

Question. What wires did you touch with the screw driver to jump the lock out out

Sounds like a stopped up gutter dripping on the turnout. I had to fix one by my bedroom so I could sleep!

Just out of curiosity, how common are Heat pumps? I've always heard of them but never seen one with my own eyes because nobody I know has one, and I live in Louisiana which is an area that is considerd good for a heat pump system but like I said I've never seen one.

What a stupid design. The control should resume operation automatically once the fault condition clears. Do you think they might have had a dirty filter? What do you think about jumping the lps circuit on the board, then rewiring the lps to be in series with the yellow wire input to the condenser? This way you'll eliminate nuisance lockouts while maintaining the ability to cut out during a low pressure condition. If the board locks out while bypassed, then you know the board is at fault. If you have some other intermittent issue, it will eventually get worse, so it can be identified.

What is that bubble sound

It’s the control board I had a subdivision with all rheem units. Multiple calls to diff houses rheem supplier told me they were defective and he had been swapping them out all month

I begin to develop a hating relationship with these unti😅

What’s the price for Evap coils now days 🤔

My customer has a similar issue the compressor nor motor turn on it is on trip/lock may be similar issue. 4 ton gas pack

How much did it cost for the defrost control board

what is a splitter

IF I can ask you. My parents church have a RP1460AJINA. When I press the contactor, it just CLICKED. Nothing. I replaced the contactor and the cap. Still the same. I get 240V to L1 and L3. But I replaced the contactor anyway. I would start with no trouble codes but after I press the contact and CLICK, I would get a trouble code. some type of flash but I gave up after 2 hrs. Any suggestions?

Curious was it a Nest tstat?

Does the LP lock out require resetting the board or will it auto-clear? My HP switch developed a resistance across it last Spring. Initially, diagnosed as a bad board because of flash code confusion between the comfort alert (on schematic) and the board flash code (on a sticker at far extreme from schematic). I doubted the diag so tested the pressure switches and found the HP had about 15 ohms across it going up to 30 when running where it shut off. Oddly, the unit would work from sundown till a couple hours after sunup. Long story short, they came with a board and HP switch, confirmed and changed the HP switch. Small hairline crack was found on the switch. With the recent AT temp changes could there be a hairline crack in the LP switch that opens when it gets colder? Might be worth changing the LP switch is cheap for the customer. Or put your meter on the switch then chill it somehow. I had a similar issue with my internet. Twice a year or so it would get sketchy but for several years they found nothing except that it couldn't handle the higher speed service. Then one year, the tech found a cracked insulator at the pole that would get pulled open when it was colder and windy.

Hi what u touch with the screwdriver? To turn on ??

Breaking the Hi and Low pressure switches with the red wire and the defrost board with the common seems like asking for trouble .

Bet it's a Sticking TXV.

422b?

how to you charge system with those gauges?

Oh the stress.

I touched the red with the brown 😔 now I can’t find the fuse

I’m looking to replace my 34-year-old Rheem. And I sure don’t want that condenser. Just to say I’m electrician and I have stocked the cap and the contactor for mine. And it’s never went out lock I don’t know. And it sucks that I have to do so because they’re all made like crap now.

maannn i wish you would say what ur doing, or describe what ur doing as ur doing it. it would be a lot more helpful to the people who come ur channel. I have a rheem unit that is giving the same issue, as this one here, but i did not get anything much from you here, because you are not talking or saying what you are doing as you are doing it. But thnx still i will try harder to see what i can gather from you. it will be a challenge though.

This is one reason I can’t stand rheem. A cabin rental facility that my company now services has all rheem equipment and every summer we will go back to the same units 2-3 times ( of course in the middle of the night half the time) and reset the high pressure lock out. All units are good on charge coils are clean blowers are working filters clean and blower wheels Are clean.

My heat pump is blowing but not hot air. Why? Is it about gas? I have no gas tank. I don't see control unit?

Was that a 16 seer condenser?

Bad contactor. Check coil. Causes a voltage drain and gets stuck flashing pressure switch wont start condenser

WHAT is that bubbling brook noise?

👍

I think I have the same unit and its been a pain in the ass, they are the loudest heat pump. With that steep angle two blade fan spinning at 1075Rpm. Most twin blade fans spin at 825 so you don't get that chop chop pulsation. My old 1989Rheem heat pump was so quite you could barley hear it and it lasted forever. Now I am in hell I cant sleep in my bedroom cause it keeps me up. They don't heat worth a shit now also. The old heat pump would heat it felt really warm this is just cold air . I am going to have to Rip out that outdoor unit and put a Mr Cool Universal outside I bought at a scratch and dent . I will never buy another Rheem.

They just keep making shit more complicated. What’s wrong with just the And the contactor. I suppose there’s no money in that.

Prob a stupid X13!

I know whats wrong with it!! Its a Rheem!!! If you go Rheem you get reamed. I worked for an HVAC contractor couple years ago over a summer, 7 out of every 10 units we replaced was a Rheem the other 3 was either Lenox or Ruud systems..

Me, I'd rip that board out and rewire the whole unit...

Mines blinking just like that. Did everything in this video and still can't get it to kick on. Furnace in basement is on but this pos won't start

Bad contactor

Can’t watch this one. That noise is to damn annoying.

Check the indoor fan on that Goodman? Nice field hack👍🏻 🥃🥃🍺🍺🍺🍇🏌🏻‍♀️ Stay safe. Retired (werk'n) keyboard super tech. Wear your safety glasses!