AirProHQ
License verified · NJ HVACR Board

Martin W Diefenbach

Verification ledger

What we checked, and what we didn't

Checked against the register at build time (Oct 31, 2026).
New Jersey contractor licenseNew Jersey Division of Consumer Affairs, State Board of Examiners of HVACR Contractors · number 19HC00593200 · expires June 30, 2028 · Warren County. Matched to this business on name.Verified
Business contactemail on file.On file
Public reviewsNo public review profile in our data. License-register listings often have none — ask for two recent local references instead.None found
Insurance & bondingNot checked by AirProHQ. Ask for the certificate of insurance before work starts — the state requires cover to hold the license, but we don't see the policy.Ask them
WorkmanshipNot inspected. A license says who is allowed to do the job, not how well it was done.Ask for references
Checked against the register at build time (Oct 31, 2026). Confirm it yourself — about thirty seconds. See our full verification methodology.Open the official lookup
About

Martin W Diefenbach, in brief

Based in Stewartsville, NJ, Martin W Diefenbach works as an HVAC contractor. NJ HVACR Board records show license 19HC00593200 on file for this business through June 2028.

HVAC contractor
Questions about this contractor

Before you call Martin W Diefenbach

01

Does Martin W Diefenbach hold a valid New Jersey license?

Yes. License number 19HC00593200 appears on the NJ HVACR Board register with an expiry of June 30, 2028. You can confirm it yourself on the official license lookup.

Sources: New Jersey Division of Consumer Affairs, State Board of Examiners of HVACR Contractors register.Report a correction
Alternatives

Other HVAC contractors near Martin W Diefenbach

Nearest listings we hold in Stewartsville. Same license check on every one.