Recall 21V428 affects 22,326 2018-2021 Heartland trailers with Winntec propane regulators that increase propane pressure. Repair is free at any franchised Heartland dealer.
Heartland is recalling 22,326 2018-2021 trailers, including Trail Runner, Mallard, Wilderness, and Shadow Cruiser models, because the Winntec model 6020 two-stage propane regulator can fail and raise propane pressure. Higher pressure can enlarge gas-appliance flames and increase fire risk; the Heartland dealer repair will be free once available.
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What's wrong?
The Winntec model 6020 two-stage propane regulator on these 2018-2021 Heartland trailers controls propane pressure before fuel reaches the stove, furnace, water heater, and other RV appliances. It takes higher pressure from the onboard propane cylinders and steps it down so the appliances receive a steady, usable flow.
The failure starts inside the regulator's second stage valve seat, the sealing surface that controls final propane flow and pressure. The seal has an inadequate mechanical lock, so it shifts out of position and stops regulating correctly. Liquid plasticizer released from the propane supply hoses also collects inside the regulator, where it changes the seal material and makes the seal easier to damage during use.
Owners can notice irregular performance from RV appliances, such as burners or other propane equipment not acting normally. A propane smell at the regulator is another warning sign, because it means the regulator is venting from high pressure.
Who's affected?
Covers 10 trailer lines from the 2018-2021 model years, all using the same Winntec 2 Stage Propane Regulator.
| 2021 Heartland Trail Runner | Lpg systems |
|---|---|
| 2018 Heartland Trail Runner | Lpg systems |
| 2020 Heartland Trail Runner | Lpg systems |
| 2021 Heartland Lithium | Lpg systems |
| 2019 Heartland Prowler | Lpg systems |
| 2019 Heartland Pioneer | Lpg systems |
| 2021 Cruiser Shadow Cruiser | Lpg systems |
| 2020 Heartland Wilderness | Lpg systems |
| 2018 Heartland Sundance | Lpg systems |
| 2019 Heartland Sundance | Lpg systems |
| 2020 Heartland Sundance | Lpg systems |
| 2021 Heartland Sundance | Lpg systems |
| 2018 Heartland Mallard | Lpg systems |
| 2021 Heartland Wilderness | Lpg systems |
| 2021 Heartland Prowler | Lpg systems |
| 2020 Heartland Mallard | Lpg systems |
| 2019 Heartland Mallard | Lpg systems |
| 2021 Heartland North Trail | Lpg systems |
| 2018 Heartland Wilderness | Lpg systems |
| 2018 Cruiser Shadow Cruiser | Lpg systems |
| 2019 Cruiser Shadow Cruiser | Lpg systems |
| 2020 Cruiser Shadow Cruiser | Lpg systems |
| 2019 Heartland Trail Runner | Lpg systems |
| 2018 Heartland Prowler | Lpg systems |
| 2020 Heartland Prowler | Lpg systems |
| 2018 Heartland Pioneer | Lpg systems |
| 2019 Heartland Wilderness | Lpg systems |
| 2021 Heartland Mallard | Lpg systems |
| 2018 Heartland Terry Classic | Lpg systems |
| 2019 Heartland Terry Classic | Lpg systems |
| 2020 Heartland Lithium | Lpg systems |
| Units affected | 22,326 |
The year and model narrow the scope, but the VIN decides. Check your VIN to confirm whether your specific trailer is included.
What's the safety risk?
Higher propane pressure can make gas-appliance flames larger and increase the risk of a fire. Treat irregular appliance performance or propane smell at the regulator as a reason to shut off propane use and contact a Heartland dealer. Repair will be free at any franchised Heartland dealer once available.
What should I do?
- Check your VIN to confirm your 2018-2021 Heartland Mallard, Shadow Cruiser, Sundance, Wilderness, Prowler, Trail Runner, Pioneer, Terry Classic, Lithium, or North Trail trailer is included in this recall.
- Contact a franchised Heartland dealer to ask about the free propane-regulator replacement and propane-system leak test.
- Reference recall number 21V428 when you call Heartland or the dealer.
- Avoid using propane appliances until the trailer is checked, since excess propane pressure can enlarge appliance flames and increase fire risk.
- Bring the recall notice if Heartland mailed one to you.
What happens at the repair
Heartland has identified the dealer repair for this propane system recall. Once the repair is available, a Heartland technician will replace the propane regulator and test the propane system for leaks. Parts and labor are covered under the recall. Heartland also has a general reimbursement plan on file for owners who already paid for a related repair before the recall notice. Contact Heartland customer service with repair documentation to ask how to submit a claim under that plan.
| Reimbursement | Reimbursement available |
|---|
Timeline
| June 4, 2021 | NHTSA published the recall |
|---|---|
| August 3, 2021 | Owner notification mailed |
| August 4, 2021 | Dealer notification began |
| August 4, 2021 | Dealer notification ended |
| August 4, 2021 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 21V428?
Recall 21V428 covers 22,326 2018-2021 Heartland trailers equipped with a Winntec model 6020 two-stage propane regulator. The regulator can fail and increase propane pressure, which can enlarge gas-appliance flames and increase fire risk. Heartland dealers replace the regulator and test the propane system for leaks for free.
What should I do if my 2018-2021 Heartland Trail Runner, Lithium, Prowler, Pioneer, Shadow Cruiser, Wilderness, Sundance, Mallard, North Trail, or Terry Classic is on this recall?
Check your VIN to confirm your specific trailer is included in recall 21V428. If it is, contact a franchised Heartland dealer to schedule the propane regulator replacement and propane-system leak test. Reference recall number 21V428 when you call. The repair is free.
Is the recall repair free?
Yes. Federal recall law requires manufacturers to repair the defect at no cost, and Heartland dealers will replace the propane regulator and test the propane system for leaks free of charge.
What is the safety risk?
The safety risk is fire. If the Winntec propane regulator fails, propane pressure can increase and make flames larger in gas appliances. Stop using propane appliances if you notice abnormal flame behavior, and arrange the free dealer repair for any trailer confirmed by VIN.
When were owners notified about recall 21V428?
Heartland mailed owner notification letters on August 3, 2021. If you own one of these trailers and never received a letter, check your VIN to confirm whether your specific trailer is included, then contact a franchised Heartland dealer or Heartland customer service at 1-877-262-8032.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/21V428000 |
|---|---|
| Heartland customer service | 1-877-262-8032 |
| NHTSA recall # | 21V428 |
| NHTSA recall # (full) | 21V428000 |
Source documents
-
Download Recall Document (PDF) (PDF) - Download Quarterly Report (PDF)
- Download Misc. Document (PDF)
- Download Recall Investigation Document (PDF) (PDF)
- Download Owner Notification Letter (PDF)
- Download Owner Notice (PDF)
- Download Recall Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 23, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →