E3 Diagnostics
Appliances/Equipment · Based in Arlington Heights, IL · Licensed in Washington · License #E3DIAD*763DH
Expired since Mar 25, 2026
State-verifiedWhat does verified mean?
- State-verified — Checked against WA L&I records, updated daily.
- Owner-verified — The business claimed this listing and verified ownership — free. Claim this listing
- Proven on Subser — The business runs real jobs through Subser — measured performance, not reviews.
License facts
E3 Diagnostics has been registered with WA L&I since 2024, based in Arlington Heights, IL. Principals on record since 2024.
- License type
- CONSTRUCTION CONTRACTOR
- Effective date
- Mar 25, 2024
- Expiration date
- Mar 25, 2026
- Suspend date
- May 31, 2024
- UBI
- 603452875
- Business type
- Corporation
- Phone
- (800) 323-4371
- Location
- Arlington Heights, IL 60004
Source: WA L&I contractor registration — verified Aug 14, 2026. Applies to every row above.
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Claim this free listingBond & insurance on file
What the bond and insurance requirements mean for homeowners
To register as a specialty contractor in Washington, a business must file a $15,000 surety bond with the Department of Labor & Industries; general contractors file $30,000.
The bond is a limited fund a homeowner (or subcontractor or supplier) can make a claim against, through the courts, if a registered contractor fails to meet its obligations on a job. Contractors must also keep general liability insurance on file — at least $50,000 in property damage and $200,000 in public liability coverage, or a $250,000 combined single limit — which covers damage the contractor causes, not workmanship disputes. The rows above are the bond and insurance filings L&I publishes for this registration; whether a specific filing applies to a specific project depends on its dates and terms.
Principals
| Name | Start date |
|---|---|
| Patrickn Maher | Mar 8, 2024 |
| Scottmichael Haag | Mar 8, 2024 |
What is a Appliances/Equipment contractor licensed to do in Washington?
Appliance and equipment contractors install and connect built-in appliances and fixed equipment — ranges, dishwashers, laundry machines, and similar units. Typical jobs include hookups to existing utilities, built-in trim installation, and equipment swap-outs. As a condition of registration, contractors in this category file a $15,000 surety bond and proof of general liability insurance with WA L&I.
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Built from Washington State L&I public records, updated Aug 14, 2026. No star ratings or reviews — verification only.