High Desert Mechanical has served industrial and commercial plants across Arizona since 2006 and is now part of Thermogenics. From our Apache Junction branch, our team covers the whole state with 24/7 emergency boiler repair, maintenance, combustion and controls work, R-stamp repairs, parts and rental boilers.
Monthly, quarterly and annual plans, combustion tuning, inspection prep, steam trap surveys and source testing.
Emergency troubleshooting, burner and controls repair, retubing, refractory, mobile welding and National Board R-stamp repairs.
Stocked service trucks, critical spares on order and the Thermogenics parts network behind them.
Containerized Thermogenics rental boilers from 150 to 500 HP, plus partner units from 30 to 2,200+ BHP.
Our team works in Arizona boiler rooms from hospital mechanical rooms to mine sites and power plants, and combustion and controls work is our core. With welding, fabrication and source testing in-house, we can take a job from diagnosis through repair and testing.
We hold the National Board R stamp for repairs and alterations to boilers and pressure vessels, so code repairs, retubing and weld work are documented properly for your inspector.
Our mobile welders work on site, our fabricators build piping and custom mechanical structures, and we perform source testing, so fewer jobs wait on outside contractors.
Thermogenics gives our team access to more parts, rental boilers and the engineering depth of a boiler manufacturer.
Outside the high country, Arizona’s boilers do little space heating. The load is process steam, sterilization, domestic hot water and laundry, and it runs all year. We work at mine and mill sites, hospitals, food and beverage plants, power and energy facilities, manufacturing plants and pharmaceutical operations.
Process heat and steam at mine and mill sites
Steam for sterilizers, kitchens and hot water
Process steam for cooking, cleaning and sanitation
Auxiliary boilers, burners and source testing
Process boilers, thermal fluid and piping systems
Process steam and documented service records
Our maintenance agreements run monthly, quarterly or annually, built around how hard your equipment works and when your inspections fall. A typical visit covers combustion analysis and burner tuning, low-water cutoff and safety control testing, flame safeguard checks on Fireye and Honeywell 7800 systems, and a look at feedwater, condensate return and chemical feed. We service Cleaver-Brooks, Fulton, Superior, Victory and Williams & Davis boilers, along with all other makes and models.
We check the whole boiler room, not just the boiler. That includes deaerators, feed pumps, steam traps, controls, process piping and cooling towers. Much of Arizona’s water is hard, and scale builds quickly on tubes and probes when treatment slips, so we look for it on every visit. In the high country around Flagstaff, we tune and test heating boilers before the cold arrives.
We tune Oilon, Weishaupt, Cleaver-Brooks and Siemens Combustion burners, set up Autoflame controls and O2 trim, and work on process burners as well as boiler burners. When your air permit calls for emissions data, we perform the source testing ourselves. A tuned burner uses less gas and trips less often.
The U.S. Department of Energy reported in 2012 that 15% to 30% of steam traps can fail in systems left alone for 3–5 years, and that regular surveys and maintenance can bring that below 5%. Our steam trap surveys find the failed traps, tag them and set out a replacement plan.
When a boiler trips or a tube fails, the first job is getting you back on steam safely. We troubleshoot burners and controls, replace failed flame safeguards and sensors, repair pumps and piping, and make temporary repairs when a permanent fix needs parts. Then we work out why it failed, whether from poor combustion, scale, short-cycling, a bad trap upstream or a control problem.
Trouble often starts elsewhere in the system, so our technicians check feedwater, condensate return, gas supply and controls before they condemn a part. We work on firetube, watertube, electric and hot water boilers, thermal fluid systems and the process burners that feed them.
Pressure-part repairs need documentation along with the welds. Our R stamp lets us retube firetube boilers, replace fittings, repair pressure vessels and document the work for your authorized inspector. We also reline refractory and castable insulation and repair doors and seals.
On the controls side, we repair and upgrade Honeywell 7800, Fireye and Siemens Combustion burner management systems and add Autoflame combustion controls with O2 trim. Older boilers can be retrofitted with current flame safeguards and safety interlocks while keeping the existing pressure vessel, which often costs less than buying a new boiler.
Our service trucks leave stocked, and we also keep a parts inventory at the branch.
Lead times on Grundfos equipment have run 8–10 weeks for a repair kit and 10–12 weeks for a new pump. We help you identify the spares that would stop your plant and order them before you need them. Parts we do not carry, we source through the Thermogenics network and its suppliers.
Controls & burner brands
Tell us which pumps and controls would shut your plant down, and we will help you stock spares before they fail.
New boilers can take about four months to arrive when factories are busy. A rental carries the load until the new unit is installed.
A rental boiler carries the load while a repair that will take weeks gets done. Thermogenics rental boilers are Thermocoil units from 150 to 500 HP, built to a 250 psig MAWP and operating from 70 to 225 psig on natural gas, propane or No. 2 oil. They ship in standard shipping containers on regular trucks, with no oversize escorts. For other sizes and types, Thermogenics draws on partner rental inventory from 30 to 2,200+ BHP, including watertube, hot water, thermal fluid and low-NOx units.
Thermogenics rentals come with installation, maintenance and 24/7 repairs while the unit is on rent. Decide early where the container will sit and how far it is from your plant steam line, because a 400 ft run can mean 2–3 weeks of piping. Each container needs a crane or a lowboy trailer to set it. Have your pressure, fuel, voltage, water details and air permit NOx limits ready when you call.
The figures below cover the Thermogenics containerized rental fleet; partner units extend the range in both directions.
| Unit type | Thermocoil coil-tube steam boilers in sea-can containers |
|---|---|
| Size | 150 to 500 HP per unit; larger on request |
| Pressure | 250 psig design (MAWP), operating 70–225 psig |
| Fuel | Natural gas, propane or No. 2 oil |
| Containers | Two-boiler 40 ft, or single 20 ft and 30 ft units |
| Network range | 30 BHP to 2,200+ BHP through Thermogenics partners |
Thermogenics rental specifications. Units are matched to your load from the Thermogenics fleet and partner inventory; call for current availability.
Visit hdmech.net
Our Apache Junction team covers Arizona statewide. The East Valley, from Mesa, Gilbert, Chandler and Queen Creek to San Tan Valley and Gold Canyon, is close by, and Phoenix is about 40 minutes away. Globe is about 1 hour east, Tucson about 2 hours south and Flagstaff about 3 hours north. We also serve Scottsdale, Tempe, Florence, Superior, Casa Grande and Payson.
Cities & towns we serve
Pyro Combustion & Controls
2969 S Highland Drive · 702-384-7976
≈ 280 mi away
Plains Mechanical Services
2300 Hawkeye Drive · 712-252-4797
≈ 1,040 mi away
Thermogenics
4426 Mt Carmel Tobasco Rd., Suite A · 513-528-0500
≈ 1,560 mi away
Yown's Boiler Service
3501 West 20th St. · 904-786-1645
≈ 1,760 mi away
Case studies and articles from across the Thermogenics group, the engineering and equipment network now behind the High Desert Mechanical team.
Thermocoil boilers in the same footprint as the old firetubes more than doubled steam generation.
Read more
Worn firetubes replaced with high-pressure Thermocoil boilers, a condensate and deaerator system, and fast-acting controls.
Read more
How sterilization, humidification and lab loads shape boiler selection as hospitals move other loads to low-grade heat.
Read moreYes. Call 480-292-6550; emergency service runs 24/7 across Arizona. Tell us what the boiler is doing, the make and model, and what it serves. The office is open 6:00 AM – 3:30 PM MST, Monday to Friday, for planned work, maintenance agreements and parts quotes.
All makes and models, including Cleaver-Brooks, Fulton, Superior, Victory, Williams & Davis, Bryan, Raypak, Lochinvar and Unilux. That covers firetube, watertube, electric and hot water boilers and thermal fluid systems. On burners and controls we service Oilon, Weishaupt, Cleaver-Brooks, Siemens Combustion, Autoflame, Honeywell 7800, Fireye and Maxitrol.
Yes. We can supply a Thermogenics containerized rental boiler from 150 to 500 HP, or a partner unit from 30 to 2,200+ BHP, and install it to carry your load while the repair is done.
Yes. Under our National Board R stamp we handle retubing, weld repairs and pressure vessel work. We document each repair and coordinate with your authorized inspector.
Yes. Our Apache Junction team serves both, along with the rest of Arizona, and our service trucks travel stocked with parts.
Yes. High Desert Mechanical joined Thermogenics in 2024 and still operates under its own name from Apache Junction. General Manager Scott Hough leads the branch. What changed is the support behind the team: parts, rental boilers and engineering from a network of over 10 Thermogenics locations.
The Industrial Commission of Arizona enforces the Arizona Boiler Rules through the ADOSH Boiler Safety Section. Since July 2017, certificate inspections have been done by authorized third-party inspection agencies, and power boilers need an annual internal inspection. We open and clean the boiler, test safety controls and low-water cutoffs, and make any repairs the inspector calls for.
Yes. We service process burners, boilers, pumps and piping at mine and mill sites, including the copper country around Globe. Our mobile welders make repairs on location.
Call High Desert Mechanical, part of Thermogenics, at 480-292-6550 for emergency repairs, maintenance planning, parts and rental boilers.
Request emergency service online