Carrier Weathermaker 8000 led stays on constant, blower works and i have power to the controller. no power at the ignitor/gas valve.

They are listed inside the front panel of the main unit.
LED CODE
EACH OF THE FOLLOWING STATUS CODES IS A TWO DIGIT NUMBER WITH THE FIRST
DIGIT DETERMINED BY THE NUMBER OF SHORT FLASHES AND THE SECOND DIGIT BY
THE NUMBER OF LONG FLASHES.
STATUS

11 NO PREVIOUS CODE - Stored status code is erased automatically after 72
hours. On RED LED boards stored status codes can also be erased when power
(115 VAC or 24 VAC) to control is interrupted.
12 BLOWER ON AFTER POWER UP (115 VAC or 24 VAC) -Blower runs for 90
seconds, if unit is powered up during a call for heat (R-W closed) or R-W opens
during blower on-delay.
13 LIMIT CIRCUIT LOCKOUT - Lockout occurs if the limit or flame rollout switch is
open longer than 3 minutes.
- Control will auto reset after three hours. - Refer to #33.
14 IGNITION LOCKOUT - Control will auto-reset after three hours. Refer to #34.
21 GAS HEATING LOCKOUT - Control will NOT auto reset.
Check for: - Mis-wired gas valve -Defective control (valve relay)
22 ABNORMAL FLAME-PROVING SIGNAL - Flame is proved while gas valve is
de-energized. Inducer will run until fault is cleared. Check for:
- Leaky gas valve - Stuck-open gas valve
23 PRESSURE SWITCH DID NOT OPEN Check for:
- Obstructed pressure tubing. - Pressure switch stuck closed.
24 SECONDARY VOLTAGE FUSE IS OPEN Check for:
- Short circuit in secondary voltage (24VAC) wiring.
31 PRESSURE SWITCH DID NOT CLOSE OR REOPENED - If open longer than
five minutes, inducer shuts off for 15 minutes before retry. Check for:
- Excessive wind - Proper vent sizing - Defective inducer motor
- Low inducer voltage (115VAC) - Defective pressure switch
- Inadequate combustion air supply - Restricted vent
- Disconnected or obstructed pressure tubing
- Low inlet gas pressure (if LGPS used)
If it opens during blower on-delay period, blower will come on for the selected
blower off-delay.
33 LIMIT CIRCUIT FAULT - Indicates a limit, or flame rollout is open. Blower will
run for 4 minutes or until open switch remakes whichever is longer. If open
longer than 3 minutes, code changes to lockout #13. If open less than 3 minutes
status code #33 continues to flash until blower shuts off. Flame rollout switch
requires manual reset. Check for: - Restricted vent
- Proper vent sizing - Loose blower wheel - Excessive wind
- Dirty filter or restricted duct system.
- Defective blower motor or capacitor. - Defective switch or connections.
- Inadequate combustion air supply (Flame Roll-out Switch open).
34 IGNITION PROVING FAILURE - Control will try three more times before lockout
#14 occurs. If flame signal lost during blower on-delay period, blower will come
on for the selected blower off-delay. Check for: - Control ground continuity
- Flame sensor must not be grounded
- Oxide buildup on flame sensor (clean with fine steel wool).
- Proper flame sense microamps (.5 microamps D.C. min., 4.0 - 6.0 nominal).
- Gas valve defective or gas valve turned off - Manual valve shut-off
- Defective Hot Surface Ignitor
- Low inlet gas pressure
- Inadequate flame carryover or rough ignition
- Green/Yellow wire MUST be connected to furnace sheet metal
45 CONTROL CIRCUITRY LOCKOUT Auto-reset after one hour lockout due to;
- Gas valve relay stuck open - Flame sense circuit failure
- Software check error
Reset power to clear lockout. Replace control if status code repeats.
If status code recall is needed, briefly remove then reconnect one main limit wire to display
stored status code. On RED LED boards do not remove power or blower door before initiatingstatus code recall. After one status code recall is completed component test will occur.

here is a link copy and paste

https://www.fixya.com/support/t6287232-carrier_8000ts


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my first impression is that the filters are too dirty and they caused the high limit to trip. needs serviced.

If it works with blower door off sounds like it's not getting enough return. What's the statics? Try an adjustable limit, I think they go to 210. Good Luck!!

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

Are the tips of the flame blue? You might need to adjust the air mixture sleeve on the burner.

Here is a link that might help. Even if it glows, it could still be bad, but it needs to prove air flow as well. Carrier Weathermaker 8000 Ignition Problem DoItYourself com Community...

sounds like the roll out switch may be sensing a clog. here is a website that can explain things better, hope it helps Tim:

http://arnoldservice.com/Troubleshooting_Heating_Problems.htm

i am not very familiar with this particular model but something must tell the gas valve to open.there must be a thermocouple or optical scanner that creates a signal to open the gas valve. if there is a signal to the gas valve then the gaas valve will need to be replaced

either the gas valve is not opening or your not getting gas to the furnace.  also the gas valve won't open unless the draft motor comes on.  if the ignitor is trying to light, but there's no gas, it might be a bad gas valve. i would call your closest NATE certified contractor