2 Electrical switch & relay parts are listed for the 2021 International RH, in 2 part types, covering the 12.4L L6 DIESEL Turbocharged engine. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 2021 International RH, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches. All 2 listed parts are A/C Refrigerant Pressure Switch (1 part) and A/C System Relay (1 part).
The 2021 International RH came with a single engine, the 12.4L L6 DIESEL Turbocharged, and every part is verified against it.
Every electrical switch & relay part listed for the 2021 International RH comes from UAC.
Each part number listed for the 2021 International RH opens a page with every vehicle that part fits.
A/C Refrigerant Pressure Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| UAC | SW11312C | 🇺🇸 US 🇨🇦 CA | Pressure Transducer | View on Amazon |
This table covers the pressure switches on the A/C circuit. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
One part is listed for the 2021 International RH — UAC SW11312C.
A/C System Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| UAC | RE8434C | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the relays that control the A/C System circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.
One part is listed for the 2021 International RH — UAC RE8434C.
Buying Electrical Switch & Relay Parts for a 2021 International RH
On this vehicle, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches.
- Confirm you have the 12.4L L6 DIESEL Turbocharged engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, inspect the connector terminals behind any failed switch — heat damage there will kill the new part too.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: A/C Refrigerant Pressure Switch and A/C System Relay .
Frequently Asked Questions
How many electrical switch & relay parts fit the 2021 International RH?
Our catalog currently lists 2 electrical switch & relay parts for the 2021 International RH across 2 subcategories and 1 brand, covering the 12.4L L6 DIESEL Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical switch & relay problems on a 2021 International RH?
Common symptoms include accessories that work intermittently, a click without action, or one function dead while its fuse tests fine. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, inspect the connector terminals behind any failed switch — heat damage there will kill the new part too.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2021 International RH was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2021 International RH?
Every part on this page is matched to the 12.4L L6 DIESEL Turbocharged engine. Then swap a suspect relay with an identical known-good one from the fuse box before buying — it is the fastest diagnostic there is. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2021 International RH
Electrical Switch & Relay Parts for Other International RH Years
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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.