Green Flow Solution logo
Schedule Service

Troubleshooting code

Back to all TAMXA0C42V41 error codes

Trane TAMXA0C42V41 Red 4 Flash troubleshooting

EEV issue. Use this page to document the issue and prepare for service. GreenFlow should handle diagnosis for electrical, refrigerant, lockout, or recurring conditions.

Virtual Consultation +1 (857) 767-6414

What the code means

Red 4 Flash: EEV issue

Trane AHR-SVX007C-EN red LED fault-code table for 5TAMX variable-speed air handlers identifies 4 Flash as an EEV issue including shorted/open coil, stuck valve, ET, GT, low superheat, or high superheat.

System area
Electronic expansion valve
Service level
Call GreenFlow

Safe checks before calling

  • Confirm the thermostat is on, set correctly, and calling for heating or cooling.
  • Check the air filter and visible return-air path for obvious airflow restrictions.
  • Look around the outdoor unit for leaves, snow, ice, or other visible obstructions without opening the cabinet.
  • Take photos of the thermostat, outdoor unit, nameplate, and any visible flash pattern before scheduling service.

When to stop and call GreenFlow

Call GreenFlow if the code repeats, the system is locked out, heating or cooling is not restored, there is ice buildup, electrical odor, unusual noise, or any issue involving pressure switches, sensors, wiring, refrigerant, reversing-valve operation, or warranty coverage.

Share the visible code, model and serial number if available, photos, current symptoms, and whether the issue affects heating, cooling, or both.

Our Services

Showing services from our catalog

AHRI Certificate Matching Support service
ResidentialCommercialSupport

AHRI Certificate Matching Support

Match supported indoor and outdoor equipment combinations to AHRI certification records for planning and documentation.

View service details
Air Conditioner Blowing Warm Air service
ResidentialRepair

Air Conditioner Blowing Warm Air

Find the cause of warm air from a central AC system and restore proper cooling where possible.

View service details
Air Conditioner Not Cooling Repair service
ResidentialRepair

Air Conditioner Not Cooling Repair

Diagnose an air conditioner that runs but does not provide expected cooling.

View service details
Air Conditioner Short Cycling Repair service
ResidentialRepair

Air Conditioner Short Cycling Repair

Diagnose frequent AC starts and stops involving airflow, controls, electrical parts, sizing, or refrigerant conditions.

View service details
Air Conditioner Water Leak Repair service
ResidentialRepair

Air Conditioner Water Leak Repair

Diagnose condensate drainage, pan, coil, and pump conditions that cause water around an AC system.

View service details
Air Conditioner Will Not Turn On service
ResidentialRepair

Air Conditioner Will Not Turn On

Diagnose an AC system that does not start or respond to the thermostat.

View service details

Red 4 Flash questions

What does Red 4 Flash mean on a Trane TAMXA0C42V41?

Trane AHR-SVX007C-EN red LED fault-code table for 5TAMX variable-speed air handlers identifies 4 Flash as an EEV issue including shorted/open coil, stuck valve, ET, GT, low superheat, or high superheat.

What Trane message is associated with Red 4 Flash?

The Trane source used for this page associates Red 4 Flash with "EEV issue". Match the visible display text, LED pattern, or alert wording to the exact code whenever possible.

What system area does Red 4 Flash point to?

This code is grouped under electronic expansion valve in the source-backed Trane troubleshooting data.

Which Trane documentation supports this Red 4 Flash page?

Source-backed Trane AHR-SVX007C-EN MCB and red LED fault-code tables for 5TAMX variable-speed air handlers.

Is Red 4 Flash an LED or flash-pattern code?

Yes. The Trane source row for this item is based on a displayed LED or flash pattern. Count the pattern exactly and compare it with the documented Red 4 Flash entry before interpreting the fault.

Is Red 4 Flash tied to the refrigerant circuit?

The source-backed row points to refrigerant-circuit or refrigerant-control context: Electronic expansion valve. Use the documented code text rather than assuming a single cause such as charge, airflow, or valve position.

What information should be captured for Red 4 Flash before clearing alerts?

Capture the exact code, any displayed alert text, the model and serial number, thermostat or control status, operating mode, symptoms, and photos of the display or LED pattern before the alert history is cleared.

Brands We Service

Our Happy Customers

Randy J.

Thanks to Andrey for an amazingly quick response to my request for a service call. He diagnosed and fixed my issue within 24 hours of my asking for help. Excellent service. Thanks.

Zachary J.

Our attic unit was leaking - Green Flow dispatched someone right away - and they fixed the problem. It was great. Will use them again if need arises.

Truc S.

I was frustrating about my heat system, they were very responsive and efficient. Andrey show up at my house after 30 mins from my call and on Sunday. He very acknowledge what is he doing. Thank you so much

Josh M.

Timely and friendly service, highly recommended.

Jerry W.

Very professional, quick, and smart. Wonderful to work with. Highly recommended!!

Max P.

Green Flow got our AC back up and running at our condo the same day! Andrey was on time, super efficient, and with the right part on hand. The price was fair enough. Would definitely recommend them!

Gilberto C.

Great service. It was awesome that they were able to solve my heating issue in few hours. Love the transparency on the pricing. Andrey was great!

Angela B.

I have used Green Flow solutions several times now for my HVAC needs and they have earned my trust! Always quick to schedule and repair things. Andrey is always pleasant to work with. I appreciate that they give honest recommendations and don’t try to upsell to the most...

Neal V.

In an industry that often fraught with contractors taking advantage of homeowners, Andrey was honest with his assessment and willing to install a product acquired elsewhere (most want that margin themselves), patiently answered my questions (I’m an engineer so like to understand what’s happening), and proactively offered practical...

Michael C.

always available, easy to get a hold of, as a property manager I get lots no heat emergency, usually get to it same day or next day

Valni D.

I’m delighted. Andrey the technician came on time and found the problem. They charged me fairly price.We thinking about hiring the company to maintain.

Daniel M.

Responsive company, timely installation professionally done. Hannah is great!