Environmental Chamber Repair: What You Need to Know

Have you experienced a breakdown with your environmental chamber and are looking for environmental chamber repair services?

Or do you want to know in advance what environmental chamber repair so you can be prepared for any eventuality?

In the following article we will try to resolve all your doubts on this matter, first addressing the topic of environmental chamber repair in general and then the repair services of our climatic chambers FDM – Environment Makers.

Environmental Chamber Repair: How Often?

The first question that comes to mind is how often you need to repair your environmental chamber yourself or turn to specialized environmental chamber repair services

The answer is: very little.

The reason is simple: climatic chambers are highly sophisticated instruments, built to last. 

Since it's a rather expensive investment, it's in the best interest of both the manufacturer and the customer that the final product meets expectations. For this reason, almost every climate chamber manufacturer performs an initial calibration of the chamber during the testing phase and then provides the customer with the relevant certification.

It is therefore not common to have to deal with failures in the ordinary use of environmental chambers and climatic chambers. 

However, if the instrument is used frequently for long periods of time, wear and tear –perhaps coupled with incorrect routine maintenance– may cause some problems.

Let's see which ones.

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Environmental Chamber Repair or Maintenance?

An important distinction to make when discussing interventions on the climatic chamber is between ordinary and extraordinary maintenance.

By routine maintenance, we mean a whole series of interventions and routine checks that are necessary for the correct functioning of the environmental chamber, to keep its performance always above certain standards and avoid actual failures.

It involves periodically checking the functioning of all systems, carefully cleaning certain components and replacing others with a certain frequency.

We've covered this topic in detail here.

Extraordinary maintenance, on the other hand, refers to actual breakdowns and malfunctions that often require the intervention of a technician.

Most common faults in environmental chamber repair

Of all the components in an environmental chamber, those that are most frequently subjected to stress are the most subject to failures that partially or completely compromise its functioning.

These include: the refrigerator compressor, the water loading valve, the various fans, the temperature and humidity probe, the humidification system, and even the so-called "brains" that control the entire climate testing system. 

These are very delicate components whose repair requires specific knowledge that only specialized technicians can provide. If you have the right technicians at your company, you can repair the climate chamber yourself.

However, we recommend contacting the manufacturer directly , who should guarantee a technical assistance service capable of carrying out prompt repairs.

This is how we do it at FDM – Environment Makers.

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FDM Environmental Chamber Repair

For over 70 years, we have been building environmental chambers with professionalism and passion, always focusing on our customers' needs. For this reason, FDM – Environment Makers offers an environmental chamber repair service through our prompt technical support team , available at support@dellamarca.it.

Additionally, our engineers can remotely connect to the camera via the RS485 port (stillFACE) or Ethernet interface (revoFACE) to make an initial assessment of the nature of the problem.

If you need anything, please do not hesitate to contact us.

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Reference Standards

• IEC 60068-3-5 — Confirmation of the performance of temperature chambers. Required for post-repair qualification and recommissioning.
• IEC 60068-3-6 — Confirmation of the performance of temperature/humidity chambers. Applicable after intervention on a humidification system.
• ISO/IEC 17025 — Competence requirements for calibration laboratories, applicable to the recalibration of sensors after maintenance.
• EN 378 (series) — Refrigerating systems and heat pumps – Safety and environmental requirements, applicable to interventions on the refrigeration circuit.
• EU Reg. 517/2014 (F-Gas) — Regulation on fluorinated greenhouse gases, mandatory license for interventions on systems > 3 kg CO₂eq.
• PED 2014/68/EU — Pressure Equipment Directive, applicable to repairs on pressure components (autoclaves, HALT/HAST).
• UNI EN ISO 13849-1 — Safety of machinery – Safety-related parts of control systems (for intervention on electrical safety devices).

Authoritative Sources

• IEC – International Electrotechnical Commission. Manages the IEC 60068-3 series for the performance qualification of environmental test chambers.
• ACCREDIA. Italy's sole accreditation body for calibration and testing laboratories.
• European Commission – DG Climate. F-Gas Regulation and refrigeration technical licenses.
• UNI – Italian Standards Organization. Transposes into Italian the EN and ISO standards applicable to the maintenance of climatic chambers.

Frequently Asked Questions About Environmental Chamber Repair

What are the most common faults in a climatic chamber?

The most frequent failures in statistical order: (1) PT100/capacitive RH (30-40% of cases) causes out-of-spec uniformity; (2) sensor drift refrigerant leak (15-20%) with loss of cooling capacity and low pressure alarms; (3) resistance humidifier failure with limescale or corrosion; (4) compressor (stage low R23/R508B in particular, MTBF 20,000-30,000 hours); (5) solenoid valves stuck on cascade cycle; (6) internal bearing fans ; (7) PLC/HMI controller with data loss or freeze. Diagnostics require: recording temperature/RH/pressure trends, visual inspection with IR thermography, refrigerant leak check with electronic gas detector (sensitivity 3-5 g/year), checking working pressure gauges (high 10-25 bar, low -0.5 to +3 bar depending on refrigerant).

How is refrigerant recharging managed according to F-Gas?

Regulation 517/2014 requires for all interventions involving fluorinated gases (R404A, R448A, R23, R508B, R134a): a technician with an F-Gas category I or II license (Presidential Decree 146/2018 in Italy), registration of the intervention in the Ministry of the Environment Database, and use of a certified recovery station with efficiency ≥ 95%. Mandatory leak checks: annually for systems 5-50 t CO₂eq, semi-annually for 50-500 t, quarterly for > 500 t. Traditional HFC refrigerants (R404A GWP 3922) are being phased out: from 2025, a ban on new commercial systems. Natural refrigerants (R290 propane, R744 CO₂, R717 NH₃) require specific licenses and safety evaluations (ATEX for propane). The technical invoice must indicate the refrigerant type, kg loaded/recovered, and post-intervention tightness check with bubbles or electronic detector.

What qualification is required after major repairs?

Major interventions (compressor replacement, complete refrigerant recharge, sensor replacement, humidifier repair, PLC firmware update) require complete requalification according to IEC 60068-3-5/6. Protocol: (1) sensor recalibration with ACCREDIA traceable references (PT100 uncertainty ≤ 0.15 °C, RH ≤ 1.5%); (2) thermal mapping of 9-27 points of the useful volume for at least 24 hours including operating setpoints (typically -40, +23, +85 °C); (3) spatial gradient verification (target ≤ 2 °C) and temporal fluctuation (≤ 0.5 °C); (4) recovery test after 30 s door opening; (5) alarm verification . IQ/OQ/PQ documentation updated with 21 CFR Part 11 audit trail. Minor interventions (filters, gaskets) require only spot verification with reference instrument.

How to estimate TCO and when is it better to repair vs. replace?

The economic rule is the 50% rule: if the repair cost exceeds 50-60% of the value of a new equivalent chamber, it is worth replacing. Additional factors to consider: (1) machine age (> 12-15 years the probability of chained failures increases); (2) component obsolescence (phase-down prohibited refrigerants, PLCs no longer supported); (3) energy efficiency (new chambers with inverters and natural refrigerants consume 30-50% less according to Ecodesign Reg. EU 2019/2019); (4) regulatory compliance (new CE, EMC, cybersecurity IEC 62443 regulations). The 10-year TCO includes: purchase cost, electricity (kWh/year × €/kWh), scheduled maintenance (3-8% value/year), annual recalibrations (1,500-5,000 €/each), periodic F-Gas recharging (500-2,000 €/each). A complete revamp at 40-60% of the cost of a new one with a 24-month warranty can extend its useful life by 5-8 years.