Expert Furnace Diagnostics & Repair
Restoring Warmth and Safety to Your Home
Modern furnaces are complex machines engineered for efficiency. When they stop working, generic troubleshooting often isn't enough. At Seabright Heating and Cooling, we specialize in the deep diagnostics required to pinpoint the exact failure in your heating system.
We don't just swap parts; we identify why they failed to ensure a long-lasting repair.
Ignition & Starting Issues
One of the most common reasons a furnace stops working is a failure in the ignition sequence. If your furnace clicks but won't fire up, or blows cold air, we inspect and repair:
Hot Surface Ignitors
Replacing cracked or burnt-out ignitors that fail to light the gas.
Flame Sensors
Cleaning or replacing oxidized sensors that falsely signal the system to shut down.
Gas Valves
Testing and replacing faulty valves to ensure proper fuel flow.
Blower Motor & Airflow Solutions
The blower motor is the heart of your furnace, pushing warm air through your ducts. If your system is loud, vibrating, or has weak airflow, we address:
Motor Replacement
Installing high-efficiency ECM or standard motors when the old one seizes.
Capacitors
Often, a "dead" motor is just a failed $20 capacitor. We check this first to save you money.
Fan Limits
Calibrating the switches that control when the fan turns on and off.
Heat Exchangers & Safety Inspections
Your safety is our top priority. The heat exchanger separates combustion fumes from your breathable air. A crack here can lead to Carbon Monoxide leaks.
Visual & Camera Inspection
We inspect heat exchangers for stress cracks or corrosion.
Safety Switch Testing
We verify that limit switches and pressure switches are active and protecting your home from overheating or exhaust back-drafting.
Carbon Monoxide Safety
A cracked heat exchanger is a serious safety hazard. If we detect any issues, we'll explain the risks and provide immediate solutions to keep your family safe.
COOLING REPAIRS
Air Conditioning Repair Services
When your air conditioning system fails, you need fast, expert repair services. Our certified technicians specialize in diagnosing and repairing all types of AC problems, from simple component failures to complex system issues. We service all major brands and models, ensuring your cooling system is restored to optimal performance.
Compressor Repairs
The compressor is the heart of your air conditioning system. When it fails, your entire cooling system stops working. Our technicians diagnose compressor issues including:
- • Hard start capacitor failures
- • Compressor motor burnout
- • Refrigerant leak detection and repair
- • Electrical connection problems
- • Overheating and thermal protection issues
- • Compressor replacement when necessary
Refrigerant System Repairs
Proper refrigerant levels are critical for efficient cooling. We handle all aspects of refrigerant system service:
- • Refrigerant leak detection using electronic detectors
- • Leak repair and system recharging
- • Refrigerant line inspection and replacement
- • Expansion valve testing and replacement
- • Evaporator and condenser coil repair
- • System evacuation and proper charging
Electrical Component Repairs
Electrical issues are among the most common AC problems. We repair and replace:
- • Capacitor testing and replacement
- • Contactor and relay repair
- • Circuit board diagnostics and replacement
- • Wiring and connection repairs
- • Fuse and circuit breaker issues
- • Thermostat wiring and calibration
Airflow and Ductwork Repairs
Poor airflow reduces cooling efficiency and comfort. We address:
- • Blower motor repair and replacement
- • Fan blade cleaning and balancing
- • Ductwork leak detection and sealing
- • Air filter replacement and maintenance
- • Register and vent adjustment
- • Airflow measurement and optimization
Condensate Drain System Repairs
Clogged or damaged condensate drains can cause water damage and system shutdowns. Our services include:
Drain Line Clearing
We use specialized equipment to clear clogs from condensate drain lines, preventing water backup and system shutdowns.
Drain Pan Repair
Cracked or damaged drain pans are repaired or replaced to prevent water leaks and potential property damage.
Safety Switch Testing
We test and replace float switches and safety switches that prevent overflow and system damage.
Drain Line Installation
New drain lines are installed when existing ones are damaged beyond repair or improperly routed.
HEAT PUMP SERVICES
Heat Pump Repair Services
Heat pumps provide both heating and cooling, making them complex systems that require specialized expertise. Our technicians are trained in all aspects of heat pump repair, from reversing valve issues to defrost cycle problems. We ensure your heat pump operates efficiently in both heating and cooling modes.
Reversing Valve Repairs
The reversing valve is what allows your heat pump to switch between heating and cooling modes. When it fails, the system can't change modes properly. We diagnose and repair:
- • Stuck or failed reversing valve replacement
- • Solenoid coil testing and replacement
- • Valve body cleaning and repair
- • Refrigerant flow direction issues
- • Electrical control problems
Defrost System Repairs
Heat pumps need to defrost the outdoor coil during heating mode. When the defrost system fails, efficiency drops dramatically. We service:
- • Defrost control board diagnostics
- • Defrost sensor testing and replacement
- • Defrost timer calibration
- • Auxiliary heat element repair
- • Outdoor coil cleaning and maintenance
Heating Mode Repairs
When your heat pump won't heat properly, several components may be involved:
- • Outdoor unit defrosting problems
- • Auxiliary heat element failures
- • Refrigerant charge issues in cold weather
- • Thermostat mode switching problems
- • Air handler blower motor issues
Cooling Mode Repairs
Heat pump cooling issues are similar to standard AC problems but require heat pump-specific knowledge:
- • Compressor operation in cooling mode
- • Refrigerant system diagnostics
- • Indoor coil cleaning and maintenance
- • Airflow optimization
- • Thermostat cooling mode calibration
Specialized Heat Pump Components
Outdoor Unit Service
We service the outdoor unit including compressor, fan motor, coils, and defrost components. Regular maintenance prevents failures in both heating and cooling modes.
Indoor Air Handler
The indoor unit requires service for blower motors, coils, filters, and electrical components. We ensure proper airflow and operation in both modes.
Refrigerant Lines
Heat pump refrigerant lines must handle bidirectional flow. We inspect, repair, and replace lines and connections to ensure proper operation.
CONTROL SYSTEMS
Thermostat and Control System Repairs
Your thermostat is the command center of your HVAC system. When it malfunctions, your entire system can fail to operate correctly. We diagnose and repair all types of thermostat and control system issues, from simple calibration problems to complex smart thermostat installations.
Mechanical Thermostat Service
Older mechanical thermostats require regular calibration and maintenance:
- • Calibration and adjustment
- • Mercury switch replacement
- • Contact cleaning and repair
- • Level installation verification
- • Wiring connection testing
- • Upgrade to digital models
Digital Thermostat Repairs
Digital thermostats offer better control but can have electronic issues:
- • Display screen replacement
- • Button and keypad repair
- • Battery replacement and power issues
- • Programming reset and restoration
- • Sensor calibration
- • Circuit board diagnostics
Smart Thermostat Services
Modern smart thermostats require professional installation and setup:
- • Wi-Fi connectivity setup
- • Mobile app configuration
- • Wiring compatibility checks
- • C-wire installation if needed
- • Programming and scheduling setup
- • Integration with HVAC systems
Zone Control System Repairs
Multi-zone systems require specialized repair services:
- • Zone damper motor repair
- • Zone control board diagnostics
- • Zone sensor calibration
- • Wiring and connection repairs
- • Zone valve replacement
- • System balancing and optimization
Common Thermostat Problems We Fix
System Won't Turn On
When your HVAC system won't respond to thermostat settings, we check wiring connections, power supply, and thermostat functionality. Often, the issue is a simple wiring problem or dead batteries.
Incorrect Temperature Readings
If your thermostat shows incorrect temperatures or your system runs constantly, we calibrate the sensor and verify proper placement away from heat sources or drafts.
Short Cycling
When your system turns on and off too frequently, we check thermostat calibration, anticipator settings, and ensure proper temperature differentials are configured.
Mode Switching Problems
If your system won't switch between heating and cooling modes, we diagnose the reversing valve (for heat pumps), check thermostat mode settings, and verify control wiring.
OUR PROCESS
Our Comprehensive Diagnostic Process
Accurate diagnosis is the foundation of effective repair. Our certified technicians follow a systematic diagnostic process using advanced tools and years of experience to identify the root cause of your HVAC problem, not just the symptoms.
Initial System Assessment
We begin with a thorough visual inspection of your entire HVAC system. Our technician examines the outdoor unit, indoor unit, ductwork, and all visible components for obvious signs of damage, wear, or malfunction. We listen for unusual noises, check for leaks, and observe system operation.
During this initial assessment, we also gather information from you about the symptoms you've noticed, when the problem started, and any recent changes to your system. This information helps guide our diagnostic process.
Advanced Diagnostic Testing
Using professional-grade diagnostic equipment, we perform comprehensive testing of all system components:
Electrical Diagnostics
- • Voltage and amperage measurements
- • Capacitor testing
- • Continuity and resistance checks
- • Circuit board analysis
Refrigerant System Testing
- • Pressure readings (high and low side)
- • Refrigerant level verification
- • Leak detection with electronic detectors
- • Temperature differential analysis
Airflow Measurement
- • CFM (cubic feet per minute) testing
- • Static pressure measurements
- • Air temperature readings
- • Ductwork airflow analysis
Component Function Testing
- • Motor operation verification
- • Safety control testing
- • Thermostat calibration check
- • System cycle analysis
Root Cause Analysis
After gathering all diagnostic data, we analyze the information to identify the root cause of the problem. We don't just fix symptoms—we determine why the component failed to prevent future issues.
Our analysis considers multiple factors: component age, wear patterns, environmental conditions, installation quality, and maintenance history. This comprehensive approach ensures we address underlying issues, not just surface problems.
We also check for related issues that may not be immediately obvious but could cause problems in the near future. This proactive approach saves time and prevents additional service calls.
Detailed Explanation and Recommendations
Before beginning any repair work, we explain our findings in clear, understandable terms. We show you what we found, why it failed, and what needs to be done to fix it.
We provide honest recommendations about repair versus replacement, considering factors like system age, repair complexity, and long-term reliability. We never pressure you into unnecessary repairs or replacements—we give you the information you need to make an informed decision.
If multiple issues are found, we prioritize them and explain which repairs are urgent and which can be scheduled for later. This helps you plan and budget for necessary work.
Professional Diagnostic Equipment
Our technicians use industry-standard diagnostic tools to ensure accurate diagnosis:
Electrical Testing
Multimeters, clamp meters, capacitor testers, and circuit analyzers for comprehensive electrical diagnostics.
Refrigerant Analysis
Manifold gauges, electronic leak detectors, refrigerant scales, and temperature probes for refrigerant system evaluation.
Airflow Measurement
Anemometers, manometers, static pressure gauges, and airflow hoods for accurate airflow and pressure testing.
Visual Inspection
Borescopes, thermal imaging cameras, and inspection cameras for detailed component examination.
System Analysis
Data loggers, system analyzers, and performance monitoring equipment for comprehensive system evaluation.
Safety Testing
Carbon monoxide detectors, gas leak detectors, and electrical safety testers for safe operation verification.
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Phone
(831) 291-7653Location
1420 N 10th St San Jose, CA 95112
Business Hours
Monday – Friday: 8:00 AM – 5:00 PM
Saturday – Sunday: Emergency Service Available