Samsung NX60A6511SS gas oven temperature swings widely, not matching set temperature

Hi, I’m Mike, your appliance troubleshooting expert—how far off is the temperature, how are you measuring it, and does it happen in Bake, Convection, or both?

After the preheat beep, how long do you wait before loading food, and if you let it run empty for 20–30 minutes does the swing narrow?

Is the door gasket intact all the way around and does the door close flush without gaps?

While it’s heating, do you hear frequent clicking/relights and see the oven flame turning off and back on every minute or so, or does it stay lit for longer stretches?

Thanks—that pattern helps. A normal gas oven will cycle around the set point, but swings of ~60°C are larger than expected (typical is roughly 10–20°C), and the frequent re‑lights every minute point to a control/feedback issue rather than just “preheat beep too early.” Most likely causes, in order:

• A drifting or slow‑responding oven temperature sensor (RTD) causing the control to overshoot and short‑cycle.
• The ignition system’s flame‑sensing (direct‑spark module/grounding) forcing frequent re‑ignitions, which can disrupt temperature stability.
• Control calibration/offset needing adjustment (Samsung allows a temperature offset in settings if the oven is consistently high/low).
• Gas supply/regulator fluctuations leading to weak/variable flame (less common without other symptoms).
• Less likely given your checks: door gasket leakage or a convection fan issue (since it happens in both modes). Safety note: If you ever smell gas, hear repeated failed ignition, or see yellow, sooty flames, stop and have a licensed tech inspect it immediately. A technician can confirm by checking the sensor’s resistance vs. temperature, verifying proper ignition/flame sense and grounding, and measuring manifold pressure; they can also set the temperature offset if needed. If you’d like, I can suggest a few simple, safe checks you can do first.

Sure—keep clear of hot surfaces and moving parts, and don’t open gas lines.

• Verify the reading: use two oven thermometers on the center rack, mid‑cavity, and avoid opening the door; let the oven run 15–20 minutes after the preheat beep, then note the high/low over 10–15 minutes in both Bake and Convection.
• Confirm the preheat/stabilize step: for this model, wait an extra 10–15 minutes after the beep before loading to see if swings narrow.
• Check the door seal and hinge tension with a paper strip: you should feel firm drag all around; any loose spot suggests heat loss.
• Make sure the oven is level front‑to‑back and side‑to‑side (small spirit level on the center rack); re‑level the feet if needed so heat isn’t pooling to one side.
• Listen and look (through the oven bottom slots) for an even blue flame when heating; brief on/off is normal, but constant clicking/relights or yellow, lifting flames indicate an ignition/airflow/regulator issue—stop and schedule service if you see that.
• Keep the rear oven vent inside the cavity clear; don’t foil‑cover the bottom panel or block airflow.
• If it’s consistently high or low by about the same amount, use the range’s Temperature Offset/Calibration setting (in the user menu) to adjust a few degrees; refer to your manual for the exact steps and limits (often up to about ±15–20°C).
• Do a simple power reset: turn the range off at the breaker for 1 minute to clear control glitches. If the swings remain >20°C or the frequent relights continue, the next step is a service visit to test the oven sensor, spark/ignition module and grounding, and gas regulator pressure. I can help you find the right service channel or look up the manual if you want.