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Rooftop Unit (RTU) Repair & Replacement · Hamilton, OntarioRooftop Unit (RTU) Repair in Hamilton
Rooftop unit (RTU) repair in Hamilton follows one decision rule: fix belts, motors, contactors, igniters and economizer parts on a unit of any age, and stop repairing when the heat exchanger is cracked, the cabinet base has rusted through, or the compressor fails on a unit past 15 years. A cracked exchanger means the gas section stays off until it is dealt with. Every repair is quoted in writing per unit; there is no flat price for rooftop work.
RTU faults on Hamilton roofs, and when to stop repairing
Where the roof is in Hamilton changes what wears out. Near the industrial bayfront and along the QEW in Stoney Creek, airborne grit loads the filters and packs the condenser coil, so a unit there runs at high head pressure and trips out in the first hot week unless the coil is washed each spring. On exposed Mountain roofs, including the plazas along Upper James, wind is the issue: access panels work loose, rain hoods rattle off and economizer hoods take driven snow. Salt spray from the highway corridors speeds up rust on cabinet bases and fasteners.
On a no-heat call the gas section usually stops for one of four reasons: a failed igniter, a dirty flame sensor, a pressure switch that will not close because the inducer or its tubing is blocked, or a rollout or limit switch that has tripped. The first three are parts. The fourth is a warning, because limits and rollouts trip when the heat exchanger is cracked or when airflow has collapsed behind a plugged filter or a broken belt. We find out which before resetting anything.
The cooling side fails on contactors, capacitors, condenser fan motors and low refrigerant from a leak, and work on the sealed system requires an ODP card. The economizer is the part most often ignored. Its actuator or outdoor-air sensor fails, the damper sticks open or shut, and the unit either heats outdoor air all winter or loses its free cooling in spring and fall. Our economizer repair page covers that fault on its own.
When a unit is past repairing, replacement is planned around the building: a 1990s unit rarely matches the footprint of its modern equivalent, so a curb adapter is measured and fabricated first, and the crane needs a closed section of the lot for a morning. We confirm permit requirements with the City of Hamilton Building Division, coordinate any gas-meter change with Enbridge Gas, and book the lift for the hours that cost tenants least. The rooftop unit service page covers the changeout, commercial HVAC in Hamilton covers the rest of the building, and you can request a roof visit.
Why ZK Mechanical for rooftop unit (rtu) repair & replacement in Hamilton
- Roof visit with model, serial, photos and a written list of what has failed and what is close behind it
- Heat exchanger inspected before any tripped limit or rollout switch is reset
- Economizer damper position, actuator and sensors checked on every visit
- Condenser coils washed on grit-loaded roofs near the bayfront and the QEW
- Curb adapter, crane, disposal and reconnection included in a replacement quote
- Carrier, Trane, Lennox, York, Daikin, Goodman and Hisense packaged units serviced
- Weekend and early-morning work at the same rates as weekdays
Licensed technicians, Hamilton dispatch, no overtime charges.
Rooftop Unit (RTU) Repair & Replacement in Hamilton — FAQs
What does rooftop unit repair cost in Hamilton?
It is quoted per unit after a roof visit, because the same symptom can be a contactor or a compressor. The written quote separates parts, labour and any crane or lift time, and you have it before work starts. On a unit past 15 years we put the replacement figure beside a large repair so the owner can compare. Evening and weekend work carries no surcharge.
Is it safe to keep running an RTU that keeps tripping out on heat?
Not by resetting it. A rooftop unit that locks out on a limit or rollout switch is shutting down to protect itself, and repeated resets on a cracked heat exchanger can put combustion gases into the supply air. Switch that unit's heat off at the thermostat, leave the fan available if the space needs air, and have the exchanger and airflow checked. Cooling-only faults are a comfort problem, not a safety one.
How often should a Hamilton rooftop unit be serviced?
At least twice a year: before cooling season for the coil wash, drain and refrigerant check, and before heating season for the burners and heat exchanger. Filters are on their own schedule, and a roof near heavy industry or a highway needs them changed more often than a suburban office does. A maintenance contract sets those dates per unit.
My RTU still uses R-22. Should it be repaired?
Minor electrical and gas-side repairs are still worth doing. A refrigerant leak is different: R-22 has been phased out, so what remains is limited and expensive, and a unit old enough to use it is usually past 15 years. A leak or a compressor failure on an R-22 unit is the point to price a replacement instead of another recharge.
Which unit should a landlord replace first across several roofs?
Rank them by three things: age, refrigerant, and the condition of the heat exchanger and cabinet base. The oldest R-22 units with rust at the base go first; younger units with sound exchangers get repaired and maintained. A per-roof asset list with photos turns that into a budget instead of a series of emergencies. See RTU versus split system if a different layout is on the table.
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Rooftop Unit (RTU) Repair & Replacement in Hamilton — fast.
Emergency repair or planned upgrade, quoted in writing before any work starts.