Walk-in cooler & freezer service
Boxes that will not hold temperature diagnosed properly — compressor, metering device, defrost cycle or a door gasket that has been leaking cold air for a year.
Refrigeration & AC Mechanic · Milton
Refrigeration & AC
service in Milton
Coolers, freezers, ice machines and heat pumps kept at temperature. Coldstream Refrigeration will find the leak instead of topping up the charge, and answer the phone when a box goes down.
- Licence 7A-83755
- In business since 2003
- We answer same day where we can
- Emergency calls answered around the clock
- Certified refrigeration mechanic
- 24/7 breakdown response
- Refrigerant handling certified
ServingMilton
What we do
Refrigeration & air conditioning services in Milton
Refrigeration & AC Mechanic in Milton
Emergency refrigeration breakdown
A failed cooler is spoiled inventory by morning, so we carry common compressors, contactors and controls and get temperature back before the product is a write-off.
Ice machine repair & cleaning
Low production, cloudy cubes or a machine that freezes into one block — descaled, sanitized and the water filter changed on a schedule you can show a health inspector.
Ductless mini-split installation
Single or multi-head heat pumps mounted, line sets run and flared properly, vacuumed down and charged by weight instead of by guess.
Rooftop unit & split system AC
Commercial rooftop units and residential condensers serviced, recharged and replaced, including the curb adapter and disconnect when the unit changes size.
Leak detection & refrigerant recovery
Electronic and nitrogen pressure testing to find where the charge is going, then recovery and recharge handled under the refrigerant handling rules rather than topped up and forgotten.
Beer, bar & display case cooling
Draught systems, back-bar coolers and open display cases dialled in so the product sits at serving temperature and the case is not sweating onto the floor.
Preventive maintenance agreements
Scheduled coil cleaning, superheat and subcooling checks and temperature logs, which is what keeps a compressor from failing on the hottest Friday of the year.
About
About Coldstream Refrigeration
Coldstream Refrigeration has kept commercial kitchens and mechanical rooms running for years, which mostly means showing up fast and fixing the cause rather than the symptom. Charge is weighed, leaks are found before gas goes in, coils get cleaned instead of ignored, and every visit leaves you with temperatures on paper. Service agreements are welcome but never a condition of getting help.
Next step
Tell us what needs doing.
The line is open around the clock for emergencies.
Credentials
The paperwork behind the work
- Service area
- Milton
- Response time
- Same day where we can
- 24/7 emergencies
- We answer day and night
Company record
- Licence
- 7A-83755
- Established
- 2003
Ask for any of these before work starts — we are happy to send them over.
- 313A Refrigeration & Air Conditioning Systems MechanicCertificate of Qualification in a compulsory trade — the licence is required to do this work in Ontario.
- Red Seal endorsementInterprovincial Red Seal in refrigeration and air conditioning.
- ODP refrigerant handling certificationCertified to handle, recover and reclaim refrigerants under the federal ozone-depleting substances rules.
- TSSA Gas Technician (G2)Licensed for the gas-fired side of rooftop units and make-up air equipment.
- Manufacturer-trained on major equipment linesFactory training kept current so warranty work is done in-house instead of subbed out.
- WSIB coverage & $2M liabilityCertificates supplied before we set foot in your kitchen or plant room.
Questions
Before you call
Don't see your question? Call and ask. We'd rather answer it on the phone than have you guess.
Call us(905) 555-0131Get a free quoteMove the most perishable product into another cooler or a rented reefer and keep the door shut on the warm box — every opening adds heat and moisture the system then has to pull back out. Note the temperature you are actually reading and whether the fans are running, because a unit that is iced solid tells us something very different from one that is silent.
Not as a plan. A sealed system does not consume refrigerant, so a low charge means there is a leak, and adding gas without finding it is both against the refrigerant handling rules and a way to spend the same money every season. We pressure test, find it, quote the repair, and then recharge by weight.
It is if you have no ductwork, a hot addition or a top floor the furnace fan never satisfies. A cold-climate heat pump also heats down to well below freezing, so many customers use it as their shoulder-season heat and let the furnace handle the deep cold. Where you already have good ducts and an aging condenser, a conventional system is usually the cheaper answer.
Twice a year for most kitchens, quarterly if the condensers sit somewhere greasy or dusty. Condenser coils are the single biggest cause of failures we see — a coil packed with lint or kitchen grease makes the compressor run hot and long until it does not run at all. Cleaning is cheap; a compressor is not.
Yes. Refrigeration fails when it is busiest and hottest, and a restaurant cannot wait until Monday. After-hours calls carry a stated surcharge that we tell you before dispatch, never after the invoice.
We tell you the age, the refrigerant it runs on and what the repair costs against a replacement. Equipment running a phased-out refrigerant is the usual tipping point, because the gas gets expensive and scarce long before the machine dies. If the repair buys you three good years for a fraction of the replacement, we will say so.
Service area
Where we work
- Milton
Opening hours
- Monday
- 7 am – 5 pm
- TuesdayToday
- 7 am – 5 pm
- Wednesday
- 7 am – 5 pm
- Thursday
- 7 am – 5 pm
- Friday
- 7 am – 5 pm
- Saturday
- 8 am – 1 pm
- Sunday
- Closed
24/7 emergency service — call anytime
Book online
Choose a time
Pick a slot that suits you and we will confirm it. No account, no waiting on hold.
Book a visit
Pick a time that works. Takes about 30 seconds.
October 2026
SMTWTFS
Contact
Get a free quote
Tell us what you need. We answer same day where we can.
- Phone
- (905) 555-0131
- Address
- Milton
- Today
- Open today 7 am – 5 pm