HARTFORD HEATING AND AIR CONDITIONING

USDOT 3238687 · status active · 6 pass / 1 fail / 2 unknown

What this page is. A rendering of FMCSA public records on a stated date. Not a safety rating, credit score, or recommendation. Source: Company Census File (az4n-8mr2, updated 2026-10-21, sha256 73d4c5901abe8cdb…).

Checks

PASS authority_active
Registration active in the census record.

fields: status_code
UNKNOWN allowed_to_operate
Not queried. Requires the live FMCSA API; the census file does not carry this field. We never default it to pass.

fields: allowed_to_operate
UNKNOWN bipd_on_file
Absence from the gap release is not proof of coverage; the release only lists carriers with no filing. Query the live API to confirm.

fields: bipd_file
FAIL mcs150_current
Last MCS-150 filing 2019-01-29, older than 24 months. Record details may be stale.

fields: mcs150_date
PASS contact_complete
Phone and email both on file.

fields: phone, email_address
PASS shared_identifier_suppressed
No suppressed identifier on this record.

fields: phone, phy_street
PASS no_involuntary_revocation
No revocation of any kind appears in the FMCSA revocation history.

fields: dot_number
PASS out_of_service_order
No out-of-service order in the FMCSA record.

fields: dot_number
PASS authority_age
Registered 2019-01-29 (2835 days ago, ~7.8 years). Context only; new authority is a higher-risk cohort, not a verdict.

fields: add_date

Identity

Legal name	HARTFORD HEATING AND AIR CONDITIONING Company Census File
DBA	JOHN THIELMANN AND SON HEATING AND AIR CONDITONING Company Census File
MC number	— Company Census File
Registration status	A Company Census File
Operation type	C Company Census File
Registered since	2019-01-29 Company Census File

Contact

Phone	2627862000 Company Census File
Email	tom@thielmannheating.com Company Census File
Officer 1	BRADLEY A SMITH Company Census File
Officer 2	THOMAS G STOLL JR. Company Census File

Address

Street	17020 W NATIONAL AVE Company Census File
City	NEW BERLIN Company Census File
State	WI Company Census File
ZIP	53151-5524 Company Census File
Country	US Company Census File

Fleet (self-reported on MCS-150)

Truck units	5 Company Census File
Power units	5 Company Census File
Drivers	24 Company Census File
CDL drivers	0 Company Census File
Intrastate drivers	24 Company Census File
Last MCS-150 filing	2019-01-29 Company Census File

Related carriers

No other active carrier shares this carrier's officer and address in the public record.

Safety history

Counts from FMCSA inspection and crash records, all history on file. Not a safety rating; FMCSA assigns ratings only after an on-site review.

Inspections	1 driver 0 · vehicle 0
Out-of-service	0 (0.0% of inspections) driver 0 · vehicle 0
Violations	3
Inspection span	2025-05-22 – 2025-05-22
Crashes	0 fatal 0 · injury 0 · tow-away 0
Crash span	— – —

Rulebook v1 · JSON