Guardian Services
TDLR-Licensed A/C Contractor · License 39866
TDLR lists Guardian Services under Texas air conditioning and refrigeration contractor license 39866.
Licensed individual on file with TDLR: Brett Douglas Muller.
TDLR shows the license as valid through October 21, 2026.
Its Google listing gives the address as 2625 National Cir, Garland (Dallas County).
Google reviewers rate it 4.6 out of 5 across 39 reviews.
License record
| TDLR license | A/C and refrigeration contractor license 39866 |
|---|---|
| Licensed individual | Brett Douglas Muller |
| License expires | October 21, 2026 |
| County in the license file | Dallas County |
| Location | 2625 National Cir, Garland, 75041 |
| Google rating | 4.6 out of 5 from 39 reviews |
| Hours (Google) | Mon 8AM-5PM · Tue 8AM-5PM · Wed 8AM-5PM · Thu 8AM-5PM · Fri 8AM-5PM · Sat Closed · Sun Closed |
| Website | guardiandallas.com |
| Google Maps | View on Google Maps |
Source: TDLR air conditioning and refrigeration contractor license file (dated 10/14/2026); Google listing match verified. Verify the license at tdlr.texas.gov before hiring.
Compare the 62 A/C contractors and mold companies in Garland, with their TDLR license records and Google ratings.
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