Sponsored

SOLVED! OFF TOPIC - Any HVAC Furnace experts here?? I need help!!

Beachcomber72

Well-Known Member
Joined
Sep 14, 2022
Threads
10
Messages
727
Reaction score
1,212
Location
Texas
Vehicle(s)
2022 JLU High Tide
Man I’m truly at a loss on this one. I’m sorry brother. Other than the possibility of blockage in the exhaust line I have no other ideas. I’ll watch the videos you posted earlier again to see if I’ve missed anything. BRB.

I’m truly praying for you.
 
OP
OP
Caliguy

Caliguy

Well-Known Member
Joined
Aug 1, 2022
Threads
27
Messages
594
Reaction score
1,214
Location
Norcal
Vehicle(s)
2022 Rubicon JLU
Here is a full video of what’s happening

 

Sponsored

jaymz

Well-Known Member
First Name
Jay
Joined
Aug 11, 2021
Threads
16
Messages
1,042
Reaction score
1,849
Location
Inland Empire
Vehicle(s)
2018 Rubicon Unlimited
It’s a long shot, but seeing how you’re in CA, your gas valve may be set too low. There’s a port to attach a manometer, and a small adjustment screw. You may be able to wing it and open the screw up an 1/8 of a turn at a time and see what happens.

Normally the thing will whistle if it’s too low, so that may not be your issue.
 

mantronics

Well-Known Member
First Name
michael
Joined
Oct 19, 2022
Threads
1
Messages
65
Reaction score
79
Location
New Jersey
Vehicle(s)
2020 Jeep unlimited Sahara
Well new thermostat did not fix it. It’s showing error code 34 now and I can’t get ignition. I was getting ignition before the new thermostat

Edit 1: just got ignition

Edit 2: now showing error code 12 again
Error code legend should be on inside/outside blower door cover or on blower housing.
 

21 Willys

Well-Known Member
First Name
David
Joined
Feb 13, 2021
Threads
1
Messages
87
Reaction score
101
Location
Shoals Junction, SC
Vehicle(s)
2021 JL Willys Sarge Green
Please help me. This has had me scratching my head for a week. Iv had a tech come out and they’re scratching their head and trying to throw parts at it.

It’s a carrier furnace model number :58MXB080-F-10116

So far, I have replace flame sensor, gas valve, capacitor, filter - no difference in any of the repairs.. arguably, got a little worse after the new gas valve as it would sometimes work for a day or so with the old gas valve, now we get consistent failures.

Here are the symptoms:

When unplugging or off for a long time, and turned on, the fan relay will click on and off several times and eventually the fan will start after about 10-15 clicks with the fan turning on for longer periods of time each time but usually not for more than a fraction of a second to 1 second.

If I go to the thermostat and turn to heat and fan on, I can eventually get the inducer motor to turn on first, then the coils will ignite, then the coils turn off, and the fan comes on.

After the fan is on for about 30 seconds, the fan relay clicks and the fan turns on and off for a second multiple times and will actually turn the fan on for 30 seconds then go back to on and off for a second. The cycle will continue until I turn off the thermostat.

If I turn on the thermostat again, the inducer motor will start, coils will ignite, and the cycle continues as above.

Seems as if the fan works, the inducer works, the gas valve works, the coils are working, but something isn’t working correctly to make it all work together except for the beginning of the cycle when I turn the thermostat on for the first time.

Here are some videos:

Initial startup after being unplugged or off for a long time:



Here is what happens when I turn on the thermostat:




Then, the coils turn off, the inducer motor turns off, and the fan turns on



Then the fan turns off, and you can hear the relay clicking to turn the fan on again



After a few attempts, the fan will turn on for about 30 seconds, then the cycle continues of attempting to turn the fan on again






Here is a full cycle:




Any help is appreciated. If someone can diagnose the correct fix, I’ll send them some $$$$!
several years ago, I had a similar issue. After replacing the board and valve, I discovered the drain line was frozen where it exits the house ( there was a slight dip in the drain line allowing it to hold water.) After thawing the drain line, it worked perfectly. I then rerouted my drain line to allow a better flow downhill. Problem solved. Long story short, check your drain line.
 
OP
OP
Caliguy

Caliguy

Well-Known Member
Joined
Aug 1, 2022
Threads
27
Messages
594
Reaction score
1,214
Location
Norcal
Vehicle(s)
2022 Rubicon JLU
several years ago, I had a similar issue. After replacing the board and valve, I discovered the drain line was frozen where it exits the house ( there was a slight dip in the drain line allowing it to hold water.) After thawing the drain line, it worked perfectly. I then rerouted my drain line to allow a better flow downhill. Problem solved. Long story short, check your drain line.
what does the drain line look like so I can check?

I just ordered a new board that will be here Amazon on Wednesday. If that doesn’t fix it, Itl have to be a physical obstruction somewhere like the drain, exhaust, or ductwork.

At that point, new board, new gas valve, new flame sensor, new capacitor, new thermostat, cleaned burners, new air filter…. The damn thing only needs a new inducer blower and new fan to be a completely new unit. But I have jumpered those and they both work
 

Sponsored

ABRubi

Well-Known Member
Joined
Jan 22, 2022
Threads
0
Messages
92
Reaction score
205
Location
America
Vehicle(s)
22 JLUR
Looking at your video, the time delay between when the burners ignite and the circulating air blower comes on is longer than it should be. A high limit is then turning off the burners and it goes into a cool down mode. That on and off is the timing circuit malfunctioning. A bad circuit board is the most likely cause.
 
OP
OP
Caliguy

Caliguy

Well-Known Member
Joined
Aug 1, 2022
Threads
27
Messages
594
Reaction score
1,214
Location
Norcal
Vehicle(s)
2022 Rubicon JLU
Looking at your video, the time delay between when the burners ignite and the circulating air blower comes on is longer than it should be. A high limit is then turning off the burners and it goes into a cool down mode. That on and off is the timing circuit malfunctioning. A bad circuit board is the most likely cause.
new board will be here Wednesday, I pray you’re right
 

Tgs

Member
First Name
T
Joined
Mar 23, 2022
Threads
0
Messages
12
Reaction score
5
Location
Indiana
Vehicle(s)
Jlus
Has anyone mentioned the vacuum switch yet?
Sponsored

 

Sponsored

TopLift Pros
 
Sponsored
Top