- How to find the nameplate on your compressor
- What each field means — model number, voltage, phase, refrigerant, and more
- How to use nameplate information to find a replacement
- What to do when your compressor model is hard to find
- How iComfort AC Supply can help with nameplate review and sourcing
When an HVAC or refrigeration compressor fails, the first thing you need to do before ordering a replacement is read the nameplate.
The nameplate is the metal label attached to the body of your compressor. It has everything you need — the model number, voltage, refrigerant type, phase, and capacity. Without this information, you risk ordering the wrong unit and making a bad situation worse.
This guide walks you through each field on the nameplate, what it means, and what to do if your compressor model is hard to find.
Where to Find the Nameplate
Look on the side or top of the compressor body. The label is usually metal and stamped or printed with manufacturer information. If it is dirty, faded, or hard to read, take a clear photo in good lighting — even a partially visible nameplate can still help identify the right replacement.
What Each Field on the Nameplate Means
| Nameplate Field | What It Means | Why It Matters |
|---|---|---|
| Model Number | The compressor's unique identifier. Always start here. | Most important field. Do not order without it. |
| Serial Number | Identifies the specific unit and production date. | Used for warranty claims and service history. |
| Refrigerant Type | The refrigerant the compressor is designed to run on (R-22, R-410A, R-404A, R-134a, R-290). | Wrong refrigerant causes failure and safety hazards. |
| Voltage | Common ratings: 208/230V, 460V, 575V. | Wrong voltage damages the unit immediately. |
| Phase | Single-phase (1-phase) or three-phase (3-phase). | Not interchangeable. Must match exactly. |
| Frequency | Most US units are 60 Hz. Some imported units are 50 Hz. | Critical for imported or specialty equipment. |
| Capacity (BTU / HP / Tonnage) | How much cooling or refrigeration the compressor provides. | Affects system performance. Verify against data sheet. |
| RLA (Running Load Amps) | Amperage while the compressor is running normally. | Used to size contactors, overloads, and wiring. |
| LRA (Locked Rotor Amps) | Amperage at startup before the motor turns. | Used for breaker and electrical protection sizing. |
| Application Type | AC, heat pump, medium-temp refrigeration, low-temp refrigeration. | Must match the system. AC and refrigeration are not interchangeable. |
How to Find a Replacement Using Your Nameplate
Step 1 — Search by the exact model number first.
This gives you the most accurate starting point. Do not order by size or tonnage alone.
Step 2 — Confirm voltage, phase, refrigerant, and application.
Before comparing any options, verify all four of these match your system exactly.
Step 3 — If the model is discontinued, check cross references carefully.
A cross reference does not automatically mean compatibility. Your technician must still verify the full system.
Step 4 — Have a licensed HVAC/R technician verify compatibility before ordering.
Compressor replacement involves refrigerant handling, electrical work, evacuation, and system testing. This step is not optional.
Step 5 — If the model is hard to find, contact a compressor sourcing specialist.
Some models are discontinued, backordered, or no longer stocked by major distributors. iComfort AC Supply specializes in sourcing these units.
Common Compressor Models We Source
These are examples of compressor brands and families we commonly source for technicians and contractors nationwide. Each model family has its own specifications — always verify from the nameplate before ordering.
Common Mistakes to Avoid When Ordering
| Mistake | Why It Is a Problem |
|---|---|
| Ordering by tonnage or size only | Two compressors can be the same tonnage but completely incompatible |
| Ignoring voltage or phase | Wrong voltage or phase damages the unit immediately |
| Assuming a cross reference is automatically compatible | Cross references must still be verified by a licensed technician |
| Using an AC compressor for refrigeration without verification | Different operating pressures and temperatures — not interchangeable |
| Not checking oil type | Wrong oil causes premature compressor failure |
| Skipping licensed technician review | Compressor replacement involves refrigerant handling and electrical work |
Frequently Asked Questions
What is the most important field on a compressor nameplate?
The model number. Always start with the exact model number from the nameplate before searching for a replacement. Do not order by size, shape, or tonnage alone.
What if my nameplate is faded or damaged?
Take the clearest photo you can in good lighting. Send it to iComfort AC Supply through our Send Us Your Nameplate form and we will do our best to identify the unit from the visible information.
Can I replace an R-22 compressor with an R-410A compressor?
No — not without a full system retrofit. R-22 and R-410A operate at different pressures and require different oils, metering devices, and system components. A licensed HVAC/R technician must evaluate the system before any refrigerant change.
What is the difference between single-phase and three-phase?
Single-phase compressors run on standard residential electrical supply. Three-phase compressors require a three-phase commercial power supply. They are not interchangeable. Always match the phase from the nameplate.
What do I do if my compressor model is discontinued?
Contact iComfort AC Supply. We specialize in sourcing discontinued, hard-to-find, and special-order compressor models that major distributors no longer stock. Send us your model number or nameplate photo and we will check availability.
Does iComfort AC Supply help with nameplate review before ordering?
Yes. Send us your compressor model number or nameplate photo before you order and we will review the information and check possible options through our iComp FitCheck process. This service is available to licensed technicians, contractors, facility managers, and homeowners nationwide.
What warranty comes with compressors from iComfort AC Supply?
Compressors come with a standard 90-day warranty when registered after purchase. Extended warranty protection plans are also available. Visit our store for current warranty and protection plan options.
How do I register my compressor warranty?
After your purchase, visit icomfortacsupply.com/pages/warranty-registration to complete your registration and activate your 90-day coverage. For assistance call (337) 516-6891 or email sales@icomfortacsupply.com.
Not Sure Which Compressor You Need?
Send us your compressor nameplate photo or model number before you order. We will review it and get back to you with available options — including exact replacements and compatible alternatives.
| 📞 Phone: (337) 516-6891 |
| 📧 Email: sales@icomfortacsupply.com |
| 🌐 Website: icomfortacsupply.com |
iComfort AC Supply is operated by iComfort Air Conditioning and Heating LLC, based in Abbeville, Louisiana.