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SKU:
NLT2J00094
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A/C Expansion Valve 61-4091 for Thermo King TriPac and TriPac Evolution
$60.99
In Stock
$60.99
Sale price
$60.99
Regular price
This aftermarket air-conditioning expansion valve replaces Thermo King 61-4091 and 614091 on compatible TriPac and TriPac Evolution auxiliary power units.
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
- Thermo King TriPac auxiliary power units
- Thermo King TriPac Evolution auxiliary power units
Product Overview
When a TriPac APU has the correct refrigerant charge and good airflow but still shows abnormal high- and low-side pressures, frosting, or poor cab cooling, the metering valve may be restricted or stuck. This TXV controls refrigerant flow into the evaporator.
Expansion-valve diagnosis requires pressure and temperature readings; low charge, a restricted drier, dirty condenser, weak fan, or compressor problem can look similar. Refrigerant service should be completed by properly equipped personnel.
Key Features & Performance
- Meters refrigerant into the TriPac evaporator
- Replacement for Thermo King 61-4091/614091
- Fits standard TriPac and TriPac Evolution APU systems
- Useful for a confirmed stuck or restricted TXV
- Aftermarket HVAC service component
Replaces Part Numbers
- 61-4091
- 614091
Common Uses
- Repairing poor APU cooling after pressure diagnosis
- Replacing a restricted expansion valve
- Correcting evaporator icing caused by faulty refrigerant metering
- Completing an A/C system repair after contamination
Technical Specifications
- Part Type: A/C Thermostatic Expansion Valve (TXV)
- System: TriPac APU air conditioning
- Function: Refrigerant metering
- Compatible Brand: Thermo King
- Replacement Type: Aftermarket
Installation & Fitment
- Recover refrigerant with approved equipment
- Protect open lines from moisture and debris
- Replace seals and the receiver-drier when service procedure calls for it
- Evacuate and recharge by the specified refrigerant weight
- Verify superheat, pressures, airflow, and leak-free operation
Compatibility Notice
Northline Parts does its best to list all known compatible models, but the correct part may fit an application not shown.
Match 61-4091/614091, line connections, valve body, and TriPac configuration. Diagnose the complete A/C system before replacement.
Frequently Asked Questions
Q: Can a bad expansion valve cause no cooling? A: Yes, if it is stuck closed, restricted, or not controlling refrigerant flow correctly.
Q: Does frost always mean the valve is bad? A: No. Low airflow, charge problems, sensor issues, and restrictions elsewhere can also cause icing.
Q: Does it fit TriPac Evolution? A: Yes, it is listed for both TriPac and TriPac Evolution applications.
Q: Can I install it without recovering refrigerant? A: No. The system must be serviced using proper refrigerant recovery and evacuation procedures.
Part Summary
keywords: Thermo King 61-4091 expansion valve, TriPac APU TXV, 614091 A/C valve replacement, TriPac Evolution cooling repair, APU refrigerant metering valve, Thermo King poor cooling part
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, dimensions, and application before purchase.