⚠Educational only. Oil heat involves fire, electrical, and carbon-monoxide hazards. Know what is safe to check, and when to stop and call a licensed technician.
Carlin Combustion Technology makes the EZ-1, EZ-2, and EZ-3 flame-retention burners found on US residential oil equipment; this page decodes the 60200 and Pro-X 70200 control LEDs (including Carlin's latch-up), lists the sourced setup specs, and shows what a technician checks.
A Carlin EZ burner. The black housing, the flame logo and the yellow model label are the tells.
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Parts shown are general references, not specific endorsements. Match any part to your unit's
make, model, and spec before buying.
Control lights & lockout codes
60200 cad-cell primary
Carlin 60200: the yellow label, three status lights and the red reset button.
Three lights: green for flame, red for lockout, amber for status. Read which light is on and whether it is steady or flashing.
Indication
What it means
Green LED ON
Flame present. Only the green light is on during a normal run.
Red LED steady ON
Lockout. The cad cell did not see flame within the trial for ignition. Hold the reset button 2 seconds, once. If it locks out again, stop and call.
Red LED flashing
Flame lost during the run. The burner shut down and waits about 65 seconds before it tries again.
Amber and red LEDs both ON
Latch-up after three lockouts in one call for heat. The burner has failed repeatedly. A technician finds the cause first, then does the longer reset.
Source: Carlin Model 60200 manual MN60200H (carlincombustion.com)
Carlin Pro-X 70200: the one with a text screen and four buttons.
A small screen with status icons across the top: Power, T-T, Limit, Igniter, Motor, Valve and Flame, plus a Fault icon that flashes with the icon of the part that has a problem, and a BV icon when a vent switch is wired in. The screen shows the state in words and the live cad cell reading in ohms during a run. It keeps a history of the last 32 fault cycles with the cause and the cad ohms at each one. After a reset, a last fault message keeps showing for about five days.
Indication
What it means
Burner Running + nnn Ohms
Normal run. The number is the live cad cell reading in ohms. Lower means a stronger flame. Press View Ohms during a run to see it.
No Flame, Check Vlv / Chk Ign / ck mtr
The trial for ignition ended without flame and the control locked out. The message names the part to check first: the valve, the igniter or the motor. Hold the red Reset button one second, once. If it locks out again, stop and call.
Lockout (fault icon flashing, message on screen)
Stopped on safety after a failed trial, or at once when flame was seen during pre-purge or lost during the trial. Hold the red Reset button one second, once. Cycling power will not reset it.
Recycle
Flame lost during the run. The burner shuts down for about 60 seconds and tries again, unless Allowed Recycles is set to None. Repeated recycles lead to lockout.
Latch-Up
Three lockouts in one call for heat. A technician finds the cause first, then holds the red Reset button 30 seconds. Cycling power will not clear it.
Pump Prime
Prime mode. Hold Reset about 10 seconds with the Limit icon on. The motor, valve and igniter run up to 2 minutes. It cannot be entered from lockout or latch-up, or with flame present. Not a fault.
30 max smart ign
The smart ignition limit. The control recycled and ran in intermittent ignition mode three times in a row and locked out on the fourth. The flame is unstable. A technician has to find out why.
Carlin 48245: red reset, three lights, terminal strip below. The 40200 and 42230 share the look.
Three lights: amber for status, red for lockout, green for flame, and a latch-up after three lockouts in one call for heat. No screen. This covers the 40200, the 42230 and the 48245 with Smart Ignition. Older 48245 units have one red lockout light, a 45 second trial for ignition and no latch-up, so read the label on your control. Carlin sells the Pro-X 70200 as the replacement for these controls.
Indication
What it means
Red LED on constant
Lockout. The cad cell did not see flame within the trial for ignition. The control also closes its alarm contact. Hold the reset button 2 seconds, once (older 48245 units: 3 seconds). If it locks out again, stop and call.
Amber and red LEDs on constant
Latch-up after three lockouts in one call for heat. A technician finds the cause first. The reset is a hold of the red button until the amber light blinks, about 10 seconds, then about 20 seconds more until the lights go out. Letting go early puts it back in latch-up.
Lockout or latch-up after a power cut
These controls keep a lockout or latch-up through a power loss. Killing the power does not clear them. That is by design.
Source: Carlin U Residential Oil Training (wiring labels for the 40200, 42230 and 48245); Carlin 40200/42230 data sheet MN40200E (carlincombustion.com).
Replacement control:6020002S Amazon ↗
Pro installCarlin sells the Pro-X 70200 as a universal replacement for these controls and for Beckett, Honeywell and ICM controls. Match the wiring and the timings of the control you have before any swap.
Often with: nozzle, pump strainer (in the tune-up kit), cad cell
Installing burner parts and setting combustion is licensed-technician work; these numbers
are for sourcing the right part. The first row is the complete burner, for a replacement
or a spare; match the model, the air tube length and the firing rate to the appliance.
Some links on this page are affiliate links: as an Amazon Associate this site earns from qualifying purchases, and it may earn from other retail partners, at no extra cost to you.
Parts shown are general references, not specific endorsements. Match any part to your unit's
make, model, and spec before buying.
Flame-retention gun burner; the current Carlin residential line. EZ-LF is the low-firing variant; -HP is the high-pressure variant.
Firing rate: EZ-1 and EZ-1-HP: 0.50 to 1.65 GPH (the rating plate and the ratings block agree). EZ-LF: 0.35 to 1.45 GPH. EZ-2/EZ-2-HP about 1.50 to 2.25 GPH; EZ-3/EZ-3-HP about 2.00 to 2.60 GPH (the head-bar table stops at 2.50).
Motor: 1/6 HP, 120VAC 60Hz, 3450 RPM, Carlin PSC (motor model J98022, replaces 1/6 and 1/7 HP motors). Burner current about 2.5 A per the ratings block; an older EZ-1 label reads 5.5 A.
Ignition: Carlin solid-state igniter, model 41000 (14,000 V) or 45000 (19,000 V, used with the 70200 control). Never test by shorting the high-voltage clips - observe spark at the electrodes with fuel OFF.
Pump pressure: Standard EZ and EZ-LF ship set at 100 psig; only the EZ-HP variants are factory-set 130 to 150 psig. Air-band divisions match nozzle size at 100 psi.
Source: Carlin EZ-1/2/3 instruction manual MNEZ123 and Select EZ-1 manual MNEZ3P (ratings blocks and the burner label, read from the page images 2026-09-03): EZ-1 0.50-1.65 GPH, EZ-LF 0.35-1.45, motor J98022 1/6 HP, igniter 41000 or 45000, 100 psig standard and LF, 130-150 psig HP only, head bars. Model lineup cross-checked at carlincombustion.com (EZ-burner model breakdown PDF).
99FRD / 100CRD / 102CRD
Legacy Carlin gun burners; still in Carlin's parts catalog (EZ66 / 99FRD / 100CRD / 102CRD parts breakdown).
Firing rate: unresolved (legacy; confirm per unit rating plate).
Source: carlincombustion.com EZ66-99FRD-100CRD-102CRD Parts Breakdown. Note: '201CRD/301CRD' and 'EZ-Pro' search terms could not be sourced to a Carlin document - treat as unresolved.
Source: Carlin U Residential Oil Training, Figure 6 electrode placement: 'Flush to 1/16"', '1/8" to 5/32"', '5/16"'.
What a technician checks
US flame retention burner. The 60200 primary has green (flame), red (lockout) and amber (status) lights. One lockout clears with a 2 second hold of the reset. After three lockouts in one call for heat it latches up, with amber and red both on. The latch-up reset is a hold of the red button for about 10 seconds until the amber light blinks, then about 20 seconds more until the lights go out, and only after the cause is fixed. The Pro-X 70200 is the screen version. It shows the live cad cell reading in ohms, keeps a history of the last 32 fault cycles with the cause and the cad ohms, and keeps a last fault message on screen for about five days after a reset. Cycling power does not clear a Carlin lockout or latch-up.
Brand reference source: Carlin Model 60200 manual MN60200H and Carlin U Residential Oil Training: latch-up after 3 lockouts, 30-second latch-up reset hold, 70200 ohms readout and fault history.
