My new oven runs hotter than my old one. Is something wrong?

Not necessarily. New ovens run more efficiently. If your old oven had calibration drift and you compensated by adding degrees, your new oven will seem hotter at the same setpoint. Test with an oven thermometer first.

My new oven runs hotter than my old one. Is something wrong?

Not necessarily. New ovens run more efficiently. If your old oven had calibration drift and you compensated by adding degrees, your new oven will seem hotter at the same setpoint. Test with an oven thermometer first.

oven temperature not accurate fix barrie - max appliance repair technician

Why Your Oven Temperature Is Wrong and How to Fix It in Barrie

Your oven says 375 F. Your baked chicken comes out raw in the middle or your cookies come out charred on the bottom. If your oven temperature is not accurate, you are not imagining things – and you are far from alone. Temperature drift is one of the most common appliance complaints we see at Max Appliance Repair Barrie, serving homes across Barrie and Simcoe County.

The good news: most causes are diagnosable in 20 minutes, and some are free to fix yourself. This guide walks through every culprit, from a simple calibration tweak to a failing thermostat, so you know exactly what you are dealing with before you call anyone.

How to test your oven temperature accurately

The display on your oven is not a thermometer. It shows you the setpoint – the temperature your oven is trying to reach – not the actual air temperature inside the cavity. Those two numbers can differ by 25 to 75 degrees Fahrenheit in a perfectly normal oven, and by much more in one that needs service.

The only reliable test is a standalone oven thermometer. You can pick one up at any kitchen store for $10 to $20. Place it on the centre rack, set the oven to 350 F, and wait a full 20 minutes after the preheat signal. Read the thermometer three times over the next 20 minutes and average the readings. If the average is more than 25 F off the setpoint in either direction, something needs attention.

Pro tip: Test at two temperatures – 350 F and 425 F. Some ovens are accurate at low heat but drift significantly at high temperatures, pointing to a specific component rather than a general calibration issue.

Write down the actual readings. If you end up calling a technician for oven repairs, that data cuts diagnosis time in half.

Calibration drift: the free fix most homeowners miss

Every oven – gas or electric – has a built-in calibration offset you can adjust without any tools. Over time, the electronic setpoint drifts slightly from the factory default. If your thermometer test shows a consistent 25 to 35 F difference in the same direction every time, calibration drift is the most likely explanation.

Most modern ovens let you offset the temperature by up to 35 F in either direction. The procedure varies by brand:

GE and Hotpoint: press and hold the Bake button for 5 seconds until “CAL” appears, then use the arrow keys to adjust.
Whirlpool and KitchenAid: press Bake, then Bake again within 4 seconds; the display shows the offset.
Samsung: go to Settings, then Oven Calibration from the control panel.
LG: press Settings and scroll to “Oven Temperature Adjustment.”

If your oven is reading consistently cold, add degrees to the offset. Consistently hot? Subtract. This fix costs nothing and takes under two minutes. If the offset is already at the maximum and your oven is still wildly off, you have a hardware problem – keep reading.

Did you know? The Canadian Standards Association (CSA) allows oven temperature variation of plus or minus 25 degrees Celsius from setpoint under normal operation. A 25 F swing is standard behaviour, not a defect.

A failing door gasket is leaking your heat

The rubber or silicone seal running around the perimeter of your oven door has one job: keep hot air inside the cavity. When it cracks, compresses, or tears, heat escapes during every bake cycle. The oven has to work harder to maintain temperature, cycling on and off more frequently, which means the temperature inside fluctuates instead of holding steady.

Testing is simple. Hold your hand a few centimetres from the door edge while the oven is at temperature. If you feel noticeable heat radiating outward, the gasket is suspect. You can also check visually – run your fingers along the gasket’s full perimeter. Any section that is compressed flat, torn, or brittle is no longer sealing properly.

Replacement gaskets for most major brands cost $20 to $60 and snap or clip into place without tools. This is one of the few oven repairs most homeowners can safely do themselves. For gas ranges, though, it is worth having a technician confirm there are no other issues while the door is off.

Bake and broil element failure

Electric ovens have two heating elements: the bake element on the bottom and the broil element at the top. Gas ovens have a burner assembly and igniter instead. When either fails partially, the oven heats unevenly or runs colder than the setpoint.

A visually failed element is obvious: you will see blistering, a crack, or a burn mark. But elements can also fail electrically without visible damage, reading open-circuit on a multimeter even though they look intact. If your oven is cold on the bottom rack but fine near the broiler, the bake element is the first thing to check. The reverse pattern – food burning on top – points to the broil element running even during bake cycles, usually from a relay stuck on the control board.

People often ask: “Can I replace an oven heating element myself?” For electric ovens, yes – the element typically pulls out after removing two or three screws and disconnecting the wiring leads. For gas ovens, the igniter and burner assembly involve a gas supply line. In Ontario, any work on gas appliances requires a licensed technician qualified under the Technical Standards and Safety Authority (TSSA) guidelines. Do not attempt this yourself.

Replacement elements for common brands like Whirlpool, GE, Frigidaire, and Samsung typically run $30 to $100 for the part. Labour in the Barrie area adds another $80 to $150 depending on the repair complexity.

dishwasher not draining repair barrie - max appliance repair technician — Six reasons your oven temperature may be inaccurate – and the typical repair cost for each in Barrie.

Six reasons your oven temperature may be inaccurate – and the typical repair cost for each in Barrie.

Thermostat and sensor probe faults

Older gas ranges use a mechanical thermostat – a physical dial connected to a bulb-and-capillary assembly inside the oven cavity. When this wears out, the thermostat reads a temperature that no longer matches reality. The oven may overshoot consistently, under-heat, or cycle erratically between the two.

Modern electric and gas ranges instead use a resistance temperature detector (RTD) – a thin metal probe mounted to the back or top wall of the oven interior. This probe sends a resistance reading to the control board, which converts it to a temperature and adjusts the heat accordingly. If the probe develops a fault – a break in the wire, a loose connection, or internal corrosion – the board receives a false reading and heats to the wrong temperature.

Testing the RTD probe requires a multimeter. At room temperature, a functioning probe should read approximately 1080 to 1100 ohms. A reading far outside that range – or an open circuit reading – means the probe needs replacement. Parts typically cost $20 to $50. This is a DIY-friendly repair on most models, but if you are unsure about working inside an appliance, a technician can do it in under 30 minutes.

When the control board is the problem

The electronic control board is the brain of a modern oven. It receives temperature readings from the probe, manages the relay that controls the heating element or gas valve, and runs the display. When the board develops a fault – from a power surge, a manufacturing defect, or simple age – it may misinterpret the probe reading and heat to the wrong temperature.

Control board failure is a diagnosis of exclusion: you rule out the probe, elements, gasket, and calibration first. If everything else checks out and the oven still reads wrong, the board is suspect. Watch for secondary symptoms: inconsistent error codes, a display that resets randomly, or relay clicks that do not correspond to the expected heating cycle.

Save your money: Before replacing a control board (which can run $200 to $400 for the part alone), ask a technician to verify the diagnosis with a wiring harness check and relay test. A board that looks faulty sometimes has a loose connector or a failed relay chip that costs $15 to replace rather than the whole board.

Board replacement is not a DIY job for most homeowners. The board sits behind the rear control panel, involves multiple wiring harnesses with anti-static handling requirements, and needs firmware calibration to the specific oven model after installation. If you are in Barrie or surrounding Simcoe County, the most cost-effective path is a diagnostic call from a technician who can test components in sequence and give you a repair-vs-replace recommendation on the spot.

Repair or replace: a quick decision guide

The general rule of thumb in appliance repair is the 50% rule: if the repair cost exceeds 50% of the cost of a comparable new appliance, replacement starts to make economic sense. For ovens and ranges, that threshold typically looks like this:

Repair type	Typical cost (Barrie)	Worth it if oven is under
Calibration adjustment	Free (DIY)	Always
Door gasket replacement	$20-$60 DIY / $120-$180 with labour	Any age oven
Heating element / RTD probe	$150-$280 with labour	Under 12 years
Thermostat replacement	$200-$350 with labour	Under 10 years
Control board replacement	$300-$500 with labour	Under 8 years, high-end model

Cost estimates reflect typical Barrie-area pricing as of 2026. Actual costs depend on brand, model, and parts availability. Ask for an estimate before authorizing any repair.

If your oven is more than 15 years old and needs a board or thermostat, it is often more economical to put that money toward a new range. Modern induction and convection models have improved significantly in energy efficiency over the past decade. That said, a well-maintained stainless steel range from a quality brand can last 20 or more years – so age alone is not the whole story.

Not sure which direction makes sense? Call Max Appliance Repair Barrie for a diagnostic visit. We will give you a straight answer, not a upsell.

GE Appliances walks through the built-in temperature adjustment feature available on most modern ranges.

Free Oven Temperature Troubleshooting Checklist

Download our step-by-step guide covering all six causes above – formatted for printing and posting in your kitchen.

Download the PDF Guide

Frequently asked questions

How much does it cost to fix an oven that runs too cold in Barrie?

The cost depends entirely on the cause. A calibration adjustment costs nothing and takes two minutes using the oven’s own menu. Replacing a door gasket runs $20 to $60 for parts if you do it yourself, or $120 to $180 including labour. A heating element or RTD sensor probe typically runs $150 to $280 with parts and labour in the Barrie area. A thermostat or control board replacement is the most expensive repair, usually $250 to $500. Max Appliance Repair charges a flat diagnostic fee and applies it toward the repair cost, so you pay for answers, not guesses.

Why does my oven overshoot the temperature and then cool down before stabilizing?

All ovens cycle on and off to maintain temperature – they do not heat continuously. The standard cycling range is plus or minus 25 degrees Fahrenheit around the setpoint. If yours swings more than 50 degrees before settling, the thermostat or temperature sensor probe is likely losing accuracy. In gas ovens, a weakening igniter that causes delayed ignition can also create a large temperature spike followed by a drop. Neither issue resolves on its own and both get worse over time.

Is an inaccurate oven temperature dangerous?

For electric ovens, inaccurate temperature is mostly a cooking quality issue, not a safety one – though a severely overheating oven poses a fire risk if it gets significantly above setpoint. For gas ovens, a faulty igniter or thermostat that causes the burner to run at full blast rather than cycling is a more serious concern. If you smell gas, notice the oven running unusually hot without reaching the right temperature, or see the burner flame appearing orange rather than blue, turn the oven off, ventilate the kitchen, and call a TSSA-licensed technician before using it again.

Can a technician fix an oven on the same day in Barrie?

Max Appliance Repair Barrie offers same-day and next-day service across Barrie, Innisfil, Alliston, Orillia, and most of Simcoe County. Common parts like heating elements, RTD probes, and door gaskets are stocked on the service van, so many repairs are completed on the first visit. Control boards and less common thermostats sometimes require a parts order, but the diagnostic visit still happens the same day so you know exactly what is needed.

My new oven is running hotter than the old one at the same settings. Is something wrong?

Not necessarily. New ovens, especially convection models, tend to run more efficiently and may cook faster than an older oven that had developed calibration drift over the years. If you have always added 25 degrees to compensate for an old oven that ran cold, your new oven set to the same temperature will seem hotter. Start by testing with an oven thermometer and comparing the actual temperature to the setpoint. If it is accurate and your food is cooking too fast, adjusting recipes (lower temperature or shorter time) is the right answer rather than changing the oven.

Service areas

Max Appliance Repair serves Barrie, Innisfil, Alliston, Orillia, Wasaga Beach, Collingwood, Bradford, and communities across Simcoe County. Same-day appointments available six days a week.

When your oven temperature is not accurate and the free calibration fix does not solve it, our technicians carry the most common parts on the van. Book a service call today.

Written by

Aanya S.

Built-In Appliance & Wall Oven Specialist

Aanya focuses on the technical specifications of built-in wall ovens, induction cooktops, and panel-ready dishwashers. She specializes in the mechanics of Bosch, Miele, and JennAir platforms, providing technical resources on control board diagnostics and installation standards for luxury homes in the Simcoe County region.