Description
Universal A/C block expansion valve — trucks & motor homes
A universal-fit block (H-block) expansion valve for trucks and motor homes. 3/8″ × 1/2″ liquid and 5/8″ × 5/8″ suction O-ring ports, 1.5-ton rating.
Universal fit — confirm before ordering. Match all four port sizes (liquid & suction), the block pattern, and the system’s tonnage/superheat against your original block valve. Not sure? Call 480-507-2229.
The valve that controls your cooling
The expansion valve is the metering device between the high-pressure liquid line and the evaporator. It drops the refrigerant’s pressure and controls exactly how much enters the evaporator — the key to efficient, consistent cold air.
The sensing element reads the temperature of the refrigerant leaving the evaporator and feeds it back to the valve, so the valve fine-tunes flow to keep the evaporator fully fed without flooding. A worn or clogged valve shows up as weak cooling, frosting, or air that can’t hold temperature.
Know exactly what you’re ordering
The details that decide whether this part matches your system:
One valve, many applications
Universal fit
A versatile block/plate valve that cross-references many OEM block valves across trucks, RVs and cars.
Four-port block design
Combines the liquid and suction ports in one block that bolts to the evaporator for a clean, sealed connection.
Precise metering
Meters refrigerant into the evaporator and senses suction-side temperature for steady, efficient cooling.
Wide interchange
Cross-references UAC and a broad range of OEM and heavy-duty brands — see the table below.
Restores cold air
A clogged or stuck block valve is a common cause of weak cooling — replacing it brings the A/C back.
Built to spec
Manufactured to meet or exceed the original valve’s port sizes and metering specs.
Interchange & cross-reference numbers
This universal valve replaces an extensive range of OEM and aftermarket expansion valves. Match your old valve against the numbers below.
| Brand | Part number(s) |
|---|---|
| UAC | EX 10094C |
| Ford | YC3Z19849AA |
| Motorcraft | YG359 |
| Four Seasons | 39206 |
| Compressor Works | 759500 |
| Advance Auto | T39206 |
| O’Reilly | 39206 |
| NAPA | 217206 · TEM217206 |
| Omega | 3131104 · 3131011 · 3131011AM · MT5522 |
| Santech | MT5522 |
| Freightliner | 308211 |
| Frigette | 208432 |
| Hodyon | 161300A |
| Ranshu | 180217 · 180217FD |
| Ready-Aire / Proliance | 4667 |
| Transtar AC | ACEV0217 |
Technical specs
Replace it right
A clean install keeps the new valve accurate and the system efficient.
Confirm the match
Check connection sizes, valve style, and superheat/tonnage against your original valve before you start.
Recover refrigerant
Safely recover the system charge before opening any lines.
Fit the valve
Install the valve with fresh O-rings; route and clamp the sensing element correctly and insulate it.
Evacuate & recharge
Replace the drier, pull a deep vacuum, then recharge to spec.
Shop universal-fit A/C parts
Browse related universal-fit parts and set your quantities in one place.
| Image | Product Name | SKU | Price | In Stock | Quantity | Add To Cart |
|---|---|---|---|---|---|---|
|
Expansion Valve Universal Fit Oring 3/8 X 1/2 12″ Capillary | 208-187 | $22.67 | In stock | ||
|
Universal Fit Expansion Block Valve For Trucks, Motor Homes 3/8 X 5/8 x 1/2 x 1/2 Tons 2 | 208-135 | $34.00 | In stock | ||
|
Universal Fit Expansion Block Valve For Trucks, Motor Homes & Jeep 1/2 X 5/8 3/8 X 1/2 Tons 2 | 208-212 | $34.87 | In stock | ||
|
Expansion Valve Externally Equalized 3/8 X 1/2 MIO 12″ Capillary | 208-143 | $49.07 | In stock | ||
|
POA Update Kit for GM & Ford Applications w/ 134A, to Convert to Cycling Switch System | 208-8024 | $128.18 | In stock | ||
|
Universal Fit Expansion Block Valve for Trucks, Motor Homes & Chrysler 5/8 X 5/8 3/8 X 1/2 Tons 1.5 | 208-231 | $32.40 | In stock | ||
|
Universal Fit Expansion Block Valve For Trucks, Motor Homes 5/8 x 3/8 x 5/8 x 1/2 | 208-432 | $39.63 | In stock | ||
|
HD Expansion Valve 3/8 x 1/2in Cap Length: 15″ Equalizer Length: 12″ Equalizer Fitting: 1/4″ FF | 208-7004 | $41.90 | In stock |
FAQ
What is a block (H-block) expansion valve?
Is this valve universal — will it fit my vehicle?
How do I know my block valve is bad?
Should I replace the receiver-drier too?
Match your part before you buy
Connection sizes and style all have to match. Send us your old part’s numbers or call and we’ll confirm the right fit.
Add to cart ↑ Confirm my fitmentAll manufacturer names and part numbers are trademarks of their respective owners and are listed for identification and cross-reference purposes only; their use does not imply affiliation or endorsement. This is an aftermarket universal-fit part. Confirm connection sizes, style, and system suitability against your application before ordering.
