Coastal furnace diagnostics & repair. Salt-air corrosion specialists. $129 heating tune-up. 24/7 emergency service available.
Furnace repair in Galveston usually comes down to one failed component: a furnace that runs but doesn't heat properly (or doesn't run at all) has almost always lost a part, and on the coast, that failure is often tied to corrosion. Gulf Coast humidity and salt air attack the internal components of furnaces during the nine months they sit idle from March through November. Relays oxidize. Sequencer contacts corrode. Heating elements develop hot spots and burn out. Control boards accumulate moisture on their circuit traces. When December rolls around and you flip the thermostat to heat, these weakened components show themselves. Coastal Eco Heating & Air diagnoses and repairs furnaces across Galveston Island, Texas City, League City, Dickinson, La Marque, and Santa Fe, with the parts and expertise to handle the salt-air damage that makes coastal furnace repair different from anything inland.
The majority of Galveston homes with furnaces run electric systems. Electric furnaces are simpler than gas (no burners, no gas valve, no ignition system), but they have their own failure points that the coastal environment accelerates.
Sequencers are the most common failure. These relay-style components turn on your heating elements in stages so the system doesn't draw its full electrical load at once. Salt corrosion on the contact points causes sequencers to stick open (elements won't heat) or stick closed (elements won't turn off, a safety hazard). A furnace with a failed first-stage sequencer blows cold air. A furnace with a failed second-stage sequencer heats, but weakly.
Heating elements themselves burn out, especially after years of sitting idle in humid conditions. A typical electric furnace has two to five elements. Losing one drops your heating capacity by 20 to 50 percent: the system runs but can't reach the thermostat setting.
Blower motors and capacitors also fail from corrosion. If your furnace makes a humming sound but no air comes out, the capacitor may have failed. If you hear nothing at all when the thermostat calls for heat, the control board or transformer may be the issue.
For homes with gas furnaces, the problems shift to the combustion side. Igniter failures are common: the hot surface igniter is a fragile ceramic component that can crack from thermal cycling or moisture exposure. A furnace that tries to start, clicks, and shuts down is usually an igniter problem.
Flame sensor rods build up an oxide coating over time and stop reading the flame properly, causing the gas valve to shut down as a safety measure. The furnace lights, runs for a few seconds, and shuts off, over and over. This is one of the most common gas furnace repair calls we see in Galveston.
Gas valve failures, cracked heat exchangers, and corroded flue connections also occur, though less frequently. A cracked heat exchanger is a safety issue (carbon monoxide risk) and typically means it's time for a replacement rather than a repair.
Every December, we get a wave of calls from homeowners who turned on their heat for the first time and something isn't right. Burning smells (dust burning off idle elements, usually normal), no heat at all, strange sounds, or a system that cycles on and off rapidly. Nine months of coastal exposure takes a toll that doesn't show itself until the system is asked to perform.
This is exactly why we recommend a $129 heating tune-up in November before the first cold front. That inspection catches corroded sequencers, weak capacitors, dirty flame sensors, and cracked igniters before they become emergency repairs on a 35-degree night.
Coastal Eco provides same-day furnace repair for daytime calls and 24/7 emergency response when heat goes out overnight during a cold snap. Our trucks are stocked with the components that fail most often in coastal environments: sequencers, heating elements, capacitors, igniters, flame sensors, and control boards. Most repairs are completed on the first visit.
Call (409) 599-1948 to schedule a repair or book a $129 pre-season tune-up. We serve the entire Galveston County Gulf Coast corridor.
Galveston · May 2026 · Merrik · From our service records
A commercial customer in Galveston reported that their unit was not cooling.
Merrik found bad wiring and a bad transformer on the unit. He replaced the transformer with a 40VA transformer and rewired the unit.
Galveston · March 2026 · Brandon & Gabriel · From our service records
A Galveston homeowner reported that the unit would not come back on after it was reinstalled by another company, and that company could not figure out how to get it running.
Brandon and Gabriel found the unit off on a low pressure code, with leaks on both flare connections, multiple kinks in the newly added lineset, control wiring wired improperly (disabling the heat pump functionality), loose high voltage connections, improper flexible conduit connections, no ground wiring in the disconnect feeding the outdoor unit, and signs that the unit had been disassembled and improperly reassembled, allowing water to get to the electrical components. They repaired the refrigerant leaks, pressure tested the system, and vacuumed it down to 416 microns isolated. They then measured the lineset length and weighed in refrigerant based on lineset length plus factory charge. Finally, they rewired the communication wiring inside and outside and set the dipswitch settings back to the original configuration from the initial install.
The unit fired up and runs as expected.
Galveston · March 2026 · Brandon & Merrik · From our service records
A Galveston homeowner in the 77554 area reported the unit leaking, the unit not working, and the unit making noise.
Across three visits, Brandon and Merrik found drain lines improperly configured, causing standing water in the air handler's internal drain pan and frequent backups leading to water damage, along with a melted common wire on the contactor outside and a bad fan motor. They chemically flushed the existing drain lines, vacuumed and flushed the internal drain pan, removed the improperly installed p traps, and installed a new smooth p trap with a ball valve and a float switch on the secondary drain to shut the system down if a backup occurs. They also replaced the heavily corroded contactor, repaired the common wire to restore operation, and replaced the fan motor.
The capacitor and refrigerant charge both checked out within spec, and the system performs as expected.
Galveston · March 2026 · Merrik · From our service records
A Galveston homeowner in the 77550 area reported that their unit was freezing up.
Merrik found that the condenser was low on refrigerant and the capacitor was bad. He put more 410-A refrigerant in the system and changed out the dual run capacitor.
Galveston · March 2026 · Merrik & Brandon · From our service records
A Galveston homeowner in the 77554 area reported high humidity in the home.
Merrik and Brandon found that the bathroom exhaust fans were not installed properly, the door sweep was not sealing, and the attic hatch was not sealing. During the visit, they performed a residential diagnostic service along with a bi-annual cooling service on the system.
Galveston · March 2026 · Brandon & Hannah · From our service records
A Galveston homeowner reported that the thermostat was fine but just didn't seem to be communicating with the unit.
Brandon and Hannah found the unit non operational due to a bad outdoor contactor that caused the low volt transformer to over amp and fail and blow the low volt fuse. They also found the unit supply wiring undersized (a single romex feeding the air handler, double tapped, feeding 65+ amps during heating operation), and ductwork that was dramatically undersized and damaged by rodents in several locations. The team replaced the failed components, including a 2 pole contactor and a 40VA transformer, to restore operation. They then checked the refrigerant charge, found it low, and added 15 oz of R-410A.
Galveston · March 2026 · Adrian & Gamaliel · From our service records
A Galveston homeowner in the 77550 area reported that the unit was not cooling and was maybe leaking gas.
Adrian and Gamaliel found refrigerant leaking from the condenser coil and a bad capacitor on the outdoor unit. The coil could not be fixed at the location of the leak. They replaced the dual run capacitor so the compressor will operate.
Galveston · March 2026 · Merrik & Hannah · From our service records
A Galveston homeowner in the 77554 area reported that their unit was not cooling.
Merrik and Hannah found that the fan motor board was bad. They determined that the part had to be ordered in.
Galveston · March 2026 · Adrian & Gamaliel · From our service records
A Galveston homeowner in the 77550 area reported water staining in the gym.
Adrian and Gamaliel found that the insulation on the suction line had been compressed where the hangers are. They replaced the sections of insulation that were compromised and properly sealed them.
Galveston · March 2026 · Adrian · From our service records
A Galveston homeowner in the 77554 area reported that their mini splits were not blowing cold air.
Adrian found that the drains were not draining and the unit was barely functional. He cleared the drains and pulled and recharged the condenser.
Need furnace repair in Galveston? Call us or book a time.
5.0 stars from 129 Google reviews
Our experts diagnose and resolve any issue.
Sequencers turn heating elements on in stages to avoid overloading the circuit. Salt corrosion on the contact points causes them to stick open (elements will not heat) or stick closed (elements will not turn off). A furnace with a failed first-stage sequencer blows cold air.
Elements have a finite lifespan and burn through faster in Galveston's humid conditions. When one element fails, you lose 20-50% of heating capacity. The remaining elements compensate by running longer, putting more wear on them and often causing cascading failures.
The hot surface igniter is a fragile ceramic component that can crack from thermal cycling or moisture exposure. A furnace that tries to start, clicks, and shuts down is usually an igniter problem.
Flame sensor rods build up an oxide coating over time and stop reading the flame properly, causing the gas valve to shut down as a safety measure. The furnace lights, runs for a few seconds, and shuts off repeatedly. This is one of the most common gas furnace repair calls in Galveston.
The blower motor moves air across heating elements and into the duct system. Motor bearings wear out faster when dust and Gulf Coast humidity combine to degrade lubrication. A failing motor gets progressively louder with grinding or squealing sounds before it stops entirely.
Relays and contactors that control power to the blower and elements corrode in Gulf Coast humidity. Symptoms include intermittent operation (the furnace works sometimes and does not other times) or a clicking sound from the control panel without the elements activating.
Explore our other heating services.
Expert furnace installation with proper sizing, efficiency matching, ductwork evaluation, and manufacturer-backed warranties.
Learn moreExpert boiler repair, maintenance, and installation for steam and hot water systems. Keep your home safely heated all winter.
Learn moreYear-round comfort from a single efficient system. We install, repair, and maintain all heat pump types including ductless models.
Learn moreCommon questions about our furnace repair.
The most common causes in Galveston are a failed sequencer (electric furnaces) or a failed igniter or flame sensor (gas furnaces). In electric furnaces, sequencers stage heating elements on in sequence. If the first-stage sequencer fails from salt corrosion, no elements activate and the blower pushes unheated air. In gas furnaces, a cracked igniter or corroded flame sensor prevents the burner from lighting or staying lit.
Usually, yes. After sitting idle for nine months in Galveston humidity, dust settles on heating elements. The first time they heat up, that dust burns off and produces a brief burning smell. It should clear within 30 minutes to an hour. If the smell persists, smells like melting plastic or rubber, or is accompanied by visible smoke, turn the system off and call for service. Those indicate an electrical or component problem.
If the furnace is under 15 years old and needs a single component replaced, repair usually makes sense. Common repairs run $100-$600 depending on the part. If the furnace is over 15-20 years old, has multiple failed components, or shows significant corrosion damage, replacement is usually the better investment. A new electric furnace runs $1,500-$3,500, and you should also consider a heat pump conversion for Galveston's mild climate.
Most furnace repairs are completed in a single visit, typically within one to two hours. Our trucks carry the components that fail most often in coastal environments: sequencers, heating elements, capacitors, igniters, flame sensors, and control boards. For less common parts, we may need to order and return for a second visit, but we will give you a clear timeline upfront.
For gas furnaces, this is usually a dirty or oxidized flame sensor. The sensor cannot detect the flame properly, so the gas valve shuts down as a safety measure. For electric furnaces, a clogged filter or failed blower motor can cause the high-limit safety switch to trip, shutting the system down to prevent overheating. Both are common and repairable issues.
Licensed & Insured
Fully licensed and insured for your protection
24/7 Emergency
Available when you need us most
11+ Years
Over a decade of trusted service
