Repair & Overhaul
Compressor swaps, motor rewinding, coil and tube cleaning, tower fill replacement and VFD retrofits — with a 48-hour diagnosis.
When a chiller trips at 2 a.m. or a tower fan sheds a blade, you need a diagnosis, not a sales call. MHM's breakdown team reaches sites inside Dhaka within 24 hours, most other districts within 48, with instruments, refrigerant, oil and the parts that fail most often.
Major work — compressor change-outs, evaporator retubing, motor rewinding, tower rebuilds, pump overhauls — is done in our Mirpur workshop or on site with a fixed quotation and a test run before handover. Every repair carries a workshop warranty.
Everything repair & overhaul covers
Compressor change-out
Scroll, screw and semi-hermetic compressors replaced, oil and driers changed, system evacuated and recharged.
Condenser & evaporator service
Tube brushing, chemical cleaning, eddy-current testing and retubing.
Motor rewinding & bearings
Fan, pump and tower motors rewound to class F, balanced and tested.
Cooling-tower rebuild
Fill, drift eliminators, sprinklers, fan blades, gearboxes and FRP casing repair.
Pump overhaul
Wear rings, impellers, seals and shafts replaced; alignment and vibration checked.
Controls & VFD retrofit
Failed controllers, contactors and drives replaced or upgraded; BMS points restored.
From first call to handover
- 1
Call & triage
Fault details taken on the 24 / 7 line; remote checks where a BMS exists.
- 2
Site diagnosis
Engineer on site within 24–48 h; written diagnosis and fixed quotation.
- 3
Repair
On site or in the Mirpur workshop; temporary cooling arranged where production cannot wait.
- 4
Test & warranty
Full-load test run, readings logged, warranty certificate issued.
Repair & Overhaul for every part of the utility block
The service lines our engineers design, install and look after under this offering.
Chillers & Boiler Care
MHM-built air and water cooled chillers, plus descaling and treatment chemicals for boilers.
Imported Cooling Towers
Foreign-brand cooling towers, sourced, shipped, erected and commissioned by MHM.
MHM Cooling Towers
Our own FRP cooling towers — designed, moulded and assembled by MHM in Bangladesh.
Water & Fluid Utilities
Effluent treatment plants and fire hydrant & sprinkler pump systems.
Compressed Air Systems
Air compressors, dryers, receiver tanks, filtration and PSA nitrogen / oxygen generators.
Power & Electrical Utilities
Generators, transformers, UPS and battery banks, switchgear, distribution panels and voltage stabilizers.
Common questions about repair & overhaul
Rental air-cooled chillers and portable towers are arranged for critical plants; ask when you call so the unit travels with the team.
Yes. We source compressors, controllers and parts through our Shenzhen and Malaysia partners and fit them with the same workshop warranty.
Other services
Design & Engineering
Cooling-load calculation, equipment selection and plant-room layout with piping and electrical drawings — before a single machine is ordered.
Supply & Installation
Chillers, towers, pumps, AHUs and panels delivered, rigged, piped and wired by our own site teams — one contractor, one warranty.
Testing & Commissioning
Flow balancing, approach and Δt checks, vibration and electrical tests — signed off in a commissioning report you can hand to an auditor.
Annual Maintenance Contract
Scheduled visits, water-side and air-side cleaning, chemical dosing and a written log after every visit — Basic, Standard or Comprehensive.
Genuine Spare Parts
Infill, nozzles, sprinklers, fans, motors, seals, controllers and compressors stocked in Mirpur for MHM, Carrier, TICA, Genius and Newin equipment.
Water Treatment Programme
Scale, corrosion and biological control for cooling towers, chillers and boilers — chemicals, dosing equipment, monthly analysis and one accountable engineer.
Energy Audit & Retrofit
Measured kW/TR of your existing plant and a costed retrofit plan — VFDs, chiller sequencing, tower fan control, pump right-sizing — with payback you can verify.
Talk to the team that does the work
Tell us your plant, brand and problem — an MHM engineer replies within one working day with next steps and a price.