HVAC fault diagnosis and repair in Sabadell
Diagnosis and repair of HVAC and refrigeration faults in industrial units, warehouses, converted buildings, offices and shops in Sabadell, with or without a maintenance contract.
HVAC faults in Sabadell follow the rhythm of its climate and its buildings. They cluster on hot summer afternoons, when rooftop units on industrial buildings run at their limit, and on cold winter mornings, when heat pumps have to start up against the full heating load. This page is for maintenance managers, managers of industrial units and warehouses, and occupiers of offices and shops in the town who need a fault diagnosed and repaired, whether or not they have a contract with MRS Climatización. The general method is described on the HVAC fault diagnosis and repair service page; here we explain what is different in Sabadell.
Summer: rooftop units at their limit
On many units across Sabadell's industrial estates, outdoor equipment sits on metal roofs in full sun, surrounded by surfaces that radiate heat. Add dust from estate roads and loading areas settling on the condenser coils, and the typical symptoms are:
- High-pressure trips in mid-afternoon that clear overnight and return the next day.
- Compressors running long hours and tripping their thermal protection.
- Condenser fans with bearings worn by continuous running.
That is why diagnosis is scheduled, wherever possible, for the hours when the fault appears. First thing in the morning the unit usually runs normally and the readings do not show the problem.
Winter: when the heating falls short
With colder winters than on the coast, heat pumps serving offices and shops run at low outdoor temperatures with frequent defrost cycles. Typical winter faults are defrost cycles that never finish, ice building up on the outdoor coil, outdoor sensors giving false readings, or outdoor unit drains freezing and blocking. Sometimes there is no fault at all: the unit was sized for summer only and cannot meet the start-up demand. Telling the two apart avoids repairing something that really needs rethinking.
Converted buildings: complaints that are not always faults
In former textile buildings converted into offices, studios or retail space, many complaints arrive as faults but have another cause: warm air collecting under high ceilings, desks next to large windows that the system does not compensate for, or extensions added in phases without rebalancing the installation. In these cases temperatures are measured at different heights and in different zones before any equipment is touched. If the cause is air distribution or flow balance, we propose the appropriate adjustment rather than replacing components that work.
Industrial refrigeration in warehouses and logistics buildings
In warehouses with storage cold rooms, a refrigeration fault puts the stored product at risk. The most frequent faults are evaporators blocked with ice, damaged door seals letting in moisture, dirty condensers, or temperature alarms caused by badly placed sensors. Before work starts, we agree with the person in charge how the stock will be protected. Because MRS also works on electrical panels and automation, the diagnosis covers the cold room's controls and switching as well.
How the repair is organised from Sabadell
- Materials and common spare parts are prepared at the production and warehouse base on Carrer de Ramon Llull, in the town itself.
- If a specific part is needed, it is planned according to the equipment and availability, and the options in the meantime are explained to you.
- Office hours are Monday to Friday, 9:00 to 18:30; if the repair means stopping a line or closing a shop, it can be done at night or out of hours, arranged in advance.
- For rooftop equipment, tell us whether access is by fixed ladder or roof hatch, or whether lifting equipment is needed.
MRS works both for contract clients and on one-off repairs without a contract. If the same fault comes back every summer, consider an HVAC maintenance contract in Sabadell that includes a pre-season inspection.
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Frequently asked questions
Why does the rooftop unit on our industrial building cut out on summer afternoons?
It is usually a high-pressure trip. On metal roofs in full sun, the condenser draws in very hot air and, if its coils are also clogged with dust, it cannot reject the heat. Overnight the unit recovers and the fault returns the next day. Confirming it means measuring pressures and temperatures at the time of day when the unit actually trips.
If the heat pump gives little heat on winter mornings, is it faulty?
Not always. There may be a defrost fault, a faulty outdoor sensor or ice building up on the coil, but it may also be a unit selected with only summer in mind that cannot meet the heating demand at start-up. Diagnosis separates the two, because the first can be repaired and the second calls for rethinking the installation.
Do you attend faults in a Sabadell industrial unit or shop without a contract?
Yes. MRS takes on one-off repairs without a maintenance contract. To prepare the visit, tell us the type of premises, the equipment affected, where it is and how it is reached. If the fault tends to recur after the repair, you may want to add that unit to a contract, but it is not a condition for attending.
Can you repair a town-centre shop's unit without closing to customers?
In many cases the diagnosis can be done with the shop open, and any repair that requires stopping the unit or working on the shop floor can be scheduled before opening, after closing or out of hours, arranged in advance. If the outdoor unit is on the roof or in a shared courtyard, it is worth letting the residents' association know about the access.
What should we do with stock if a warehouse cold room fails?
First, keep the door closed and monitor the internal temperature. Before any work starts, we agree with the person in charge whether the product needs to move to another cold room or a refrigerated vehicle while the repair is carried out. When reporting the fault, say what is stored and at what temperature, as it determines the order of work.
Report a fault in Sabadell
Tell us the premises, the equipment, the symptoms and how it is reached, so we can prepare the diagnosis from our base.
Report a fault