DBA: Ace Heating And Cooling
John Walker Heating & Cooling Inc is an active intrastate non-hazmat carrier based in Rocklin, CA.
No insurance filings on record.
View on FMCSA L&I| Vehicle Type | Owned | Term Leased | Trip Leased |
|---|---|---|---|
| Straight Trucks | 1 | 0 | 0 |
| Trailers | 1 | 0 | 0 |
| Total Power Units | 1 | ||
Distinct vehicles · 24 mo
vs 1 self-reported (MCS-150)
Top makes
Registered in
Higher values = more violations. 0 = clean record.
| Category | Insp w/ Viol |
|---|
| Category | vs. Cohort | vs. State | Reading |
|---|---|---|---|
| Unsafe Driving | 0% | 0% | Better than most peers |
| HOS Compliance | 0% | 0% | Better than most peers |
| Driver Fitness | 0% | 0% | Better than most peers |
| Controlled Substances | 0% | 0% | Better than most peers |
| Vehicle Maintenance | 96% | 96% | Worse than most peers |
Lower percentile = lower SMS measure = stronger safety record. Computed nightly across active carriers in the same state and fleet-size band.
| Type | Inspections | OOS | OOS % | Nat'l Avg |
|---|---|---|---|---|
| Driver | 0 | 0 | — | 6.67% |
| Vehicle | 0 | 1 | — | 22.26% |
| Hazmat | 0 | 0 | — | 4.44% |
Where they run
Inspected in 1 state. Top state CA accounts for 100% of activity. Activity outside home state (CA): 0%.
| Period | Fatalities | Injuries | Tow-away | Total |
|---|---|---|---|---|
| No crashes recorded | 0 | 0 | 0 | 0 |
Most-cited violation codes
| BASIC Category | Total | Severe | OOS |
|---|---|---|---|
| Vehicle Maintenance | 8 | 2 | 1 |
| Date | State | Vehicle | Violations | OOS |
|---|---|---|---|---|
| Mar 25, 2026 | CA | STRAIGHT TRUCK | 3 | 0 |
| Mar 3, 2026 | CA | STRAIGHT TRUCK | 1 | 1 |
| Aug 7, 2024 | CA | STRAIGHT TRUCK | 4 | 0 |
Carriers that share an officer, phone, or email with this DOT.
Shared officer · 6
J & J Truck And Heavy Equipment Repain Inc
Muskogee, OK
Johnny Walker Jr · also at 6 others
Johnny Walker
Dansville, MI
Johnny Walker Jr · also at 6 others
John R Walker Inc
Macon, GA
Johnny Walker Jr · also at 6 others
J & V Excavating Inc
Dansville, MI
Johnny Walker Jr · also at 6 others
Smith & Walker Freight Hauling
Fort Worth, TX
Johnny Walker Jr · also at 6 others
| Measure |
|---|
| Alert |
|---|
| Unsafe Driving | 0 | 0.00 | — |
| HOS Compliance | 0 | 0.00 | — |
| Vehicle Maintenance | 3 | 8.85 | — |
| Driver Fitness | 0 | 0.00 | — |
| Controlled Substances | 0 | 0.00 | — |
| Date |
|---|
| Code |
|---|
| Description |
|---|
| BASIC |
|---|
| OOS |
|---|
| Mar 25, 2026 | 39311A1CSLRR | Conspicuity Systems - Truck tractor lower rear retro reflective sheeting missing on vehicle manufactured on or after July 1 1997 | Vehicle Maintenance | — |
| Mar 25, 2026 | 39311A1LRLM | Lighting - Tail lamp - Any missing | Vehicle Maintenance | — |
| Mar 25, 2026 | 39395KEE | Emergency Equipment - Stopped vehicle warning devices inadequate flag size | Vehicle Maintenance | — |
| Mar 3, 2026 | 39343DB | Brake - Missing or inoperable breakaway braking system on a trailer(s) or converter dolly | Vehicle Maintenance | Yes |
| Aug 7, 2024 | 3939T | Inoperable tail lamp | Vehicle Maintenance | — |
| Aug 7, 2024 | 3922WC | Wheel (Mud) Flaps missing or defective | Vehicle Maintenance | — |
| Aug 7, 2024 | 39395A | No/discharged/unsecured fire extinguisher | Vehicle Maintenance | — |
| Aug 7, 2024 | 39395F | Emergency Equipment - Stopped vehicle warning devices missing or improper | Vehicle Maintenance | — |