“Our bedroom radiator banged and gurgled all winter. The technician drained and refilled the loop, and the quiet difference is unbelievable. Friendly guy who respected our home.”
UN
Uma N.Corunna, ON
Services
Fast Thermostat Repair and Smart Replacements in Ontario
Sarnia Heating & Cooling: A thermostat that misreads by a few degrees quietly inflates your heating bills all winter. Our technicians diagnose faulty sensors, worn wiring, and failing controls, then repair or replace them with properly calibrated units that put an end to the guessing.
Why Homeowners Call Us
Thermostat won't turn on or keeps showing the wrong temperature?
Wild temperature swings often trace back to a mislocated thermostat or a drifting sensor. We recalibrate or replace it for steady, even heat.
Diagnosis Before We Touch Anything
Thermostat symptoms often point elsewhere, so we test the transformer, wiring, and control board first. That discipline prevents needless replacements and confirms the real fault before any part is ordered or installed.
Seasonal Checkups Catch Faults Early
A thermostat fault in October is an inconvenience; the same fault in February is an emergency. Fall checkups catch dying batteries, corroded wiring, and sticky switches before the deep cold arrives.
Every Repair Backed in Writing
Repairs and installations come with written documentation of what was done and which parts were used. If anything we touched fails, you have our name, our number, and our promise.
FAQ
Thermostat Repair & Replacement in Sarnia: Common Questions
How much does thermostat repair or replacement cost?
Honest answer: until we test it, nobody can say. Diagnostics are how we find out, and the quote you get afterwards is free and fixed.
How quickly can a thermostat be repaired or replaced?
Fast, because we show up prepared. Stocked trucks and simple diagnostics mean the vast majority of thermostat jobs are finished the same day we first see them.
Should I repair my thermostat or replace it with a new one?
Our rule: never replace what a proper repair can carry, never repair what keeps failing. We test first, then give you the honest verdict in plain language.
Reviews
What Sarnia Homeowners Say
Real feedback from neighbours we've helped stay comfortable year-round.
“With a newborn at home, a cold house was not an option. They answered immediately, squeezed us in that evening, and the heat came back on before bedtime. So grateful.”
DW
Dana W.Corunna, ON
“Booked a heating inspection and the technician did the most thorough heat exchanger check I have seen, with a camera and photos. Everything checked out and nothing was upsold.”
BK
Benjamin K.Corunna, ON
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We Can Help Solve Your Thermostat Repair & Replacement Needs
Don't let a comfort problem disrupt your home. Get fast, reliable service from Sarnia's trusted local HVAC team.