Pontiac homes were built for
autoworkers in the 1910s through 1940s.
Pontiac grew with the automotive industry. The residential streets built for GM Truck and Bus workers, Fisher Body employees, and Pontiac Motor Division workers between 1910 and 1945 have some of the oldest steam heating systems in Oakland County. These are not just old — they are pre-war systems that were engineered differently from the post-war boilers most technicians know.
Gravity steam — how it differs from modern steam
The oldest Pontiac homes have gravity-fed steam systems where steam flows to radiators powered purely by pressure differential, with no pump. These systems have larger diameter pipes than post-war installations and specific pressure requirements — typically operating at 0.5 to 1.0 PSI rather than the 1.5 to 2.0 PSI of post-war systems. Setting pressure too high on a gravity system causes water hammer, not better heat distribution.
Saginaw Street and the Wide Tracks neighborhood
The residential streets adjacent to Saginaw Street and the former Wide Tracks Boulevard have some of Pontiac's oldest housing stock. Two and three story worker homes from the 1910s and 1920s have steam systems that were converted from coal to gas in the 1940s and 1950s. The original piping and radiators from 1920 are often still in place. The boiler may have been replaced once. The distribution system has not changed in 100 years.
Pontiac post-war housing — different system, same age issue
The houses built for returning veterans and young automotive workers in Pontiac between 1945 and 1958 have more conventional post-war one pipe and two pipe steam systems. These are in the same general condition as Macomb County housing from the same era — 70-plus-year-old Weil McLain and Burnham boilers with controls at end of service life and air vents or traps that have failed individually.
What goes wrong and
what it costs to fix.
| Problem | Likely Cause | Typical Cost | Urgency |
|---|---|---|---|
| No heat at all | Low water cutoff, thermocouple, igniter | $200–$600 | 🔴 Same Day |
| Cold radiator — one pipe | Failed air vent, steam cannot enter | $80–$250 | 🟡 This Week |
| Cold radiator — two pipe | Failed steam trap at that radiator | $150–$450 | 🟡 This Week |
| Pipes banging at night | Water hammer, pipe pitch shifted | $200–$700 | 🟡 This Week |
| Gas bill jumped $100+ | Steam trap stuck open, bleeding steam | $150–$450 | 🟡 This Week |
Pre-war and post-war Pontiac systems
fail differently. We know both.
Gravity steam in older Pontiac homes and forced-circulation steam in post-war Pontiac homes need different diagnostic approaches. ABBCO identifies which you have and what specifically failed.
Gravity steam pipe pitch correction
In a 100-year-old Pontiac home, foundation settling has shifted the pitch of steam pipes that were installed perfectly level in 1920. Condensate no longer drains by gravity back to the boiler. Water sits in the pipes, steam hits it, and the pipes bang. The fix is locating the low points and correcting pitch — shimming or re-supporting the affected runs. Cost: $200 to $700 depending on how many runs are affected.
Pre-war boiler coal-to-gas conversion maintenance
Pontiac boilers that were converted from coal to gas in the 1940s may have older draft configurations that do not match current gas burner requirements. Flue gas rollout and incomplete combustion are real risks on improperly maintained coal-converted boilers. ABBCO checks draft, burner condition, and flue gas composition on every Pontiac pre-war boiler call before diagnosing the heating complaint.
Low water cutoff on aging Pontiac boilers
Pre-war Pontiac boilers have original float-type low water cutoffs that may be 50 to 80 years old. When the float or linkage corrodes, the cutoff can fail to shut the burner off during a genuine low water event — a dangerous failure mode. Replacement with a current-generation McDonnell Miller cutoff costs $200 to $450 and is one of the highest-value repairs available on any old boiler.
Questions homeowners ask
before calling ABBCO.
Yes. Pre-war gravity steam is ABBCO's specialty. We have diagnosed and repaired systems from the 1910s through the 1940s across Macomb and Oakland County. The oldest systems need technicians who understand the specific pressure, pipe sizing, and draft requirements of pre-war steam. Most modern HVAC companies do not.
ABBCO covers 48340, 48341, and 48342 with same day service. Call (586) 742-3429 for dispatch.
A pre-war boiler that has been properly maintained, has a functional low water cutoff, and shows no flue gas spillage is safe to operate. The danger is deferred maintenance — a low water cutoff that sticks, a flue connection that has cracked, or a pressure relief valve that no longer seats. Annual inspection addresses all three. Running a pre-war boiler without annual inspection is the unsafe choice, not running it at all.
Pontiac steam boiler repairs run $200 to $800 for most calls. Gravity steam pipe pitch correction $200 to $700. Pressuretrol replacement $150 to $350. Low water cutoff replacement $200 to $450. Full boiler replacement in Pontiac $2,850 to $6,200 installed. Written estimate before any work.
More Steam Boiler Services
Every steam boiler problem
we fix in Pontiac, MI.
Same day service, written estimate before any work. (586) 742-3429 answered 24 hours.
🔴 Emergency No-Heat Repair
Boiler completely dead? 24-hour dispatch from Warren base.
🟡 Boiler Runs But No Heat
Six causes — pressure, venting, water, controls. Diagnosed same day.
🟡 Banging Pipes
Water hammer from pipe pitch shift. $200 to $700. Rarely needs replacement.
🟡 Steam Trap Failure
Gas bill spike or cold radiator on two pipe system. $150 to $450 per trap.
🟡 One Pipe System Repair
Air vent replacement for cold radiators. $80 to $250. Same day.
🟡 Two Pipe System Repair
Steam trap survey — one per radiator. Test all, replace failed ones.
🟢 Cast Iron Boiler Repair
Weil McLain, Burnham, Peerless. 60 to 80 year service life — most worth repairing.
🟢 Annual Maintenance
Pre-season inspection before October. $150 to $300.
Steam boiler acting up?
Call ABBCO.
Same day service. Written estimate before any work. Answered 24 hours.