Table 9 – Troubleshooting Chart

SYMPTOM

CAUSE

REMEDY

 

 

 

 

Power failure

Call power company

 

 

 

 

Fuse blown or circuit breaker tripped

Replace fuse or reset circuit breaker

 

 

 

 

Defective contactor, transformer, control relay, or

Replace component

 

high--pressure, loss--

Compressor and outdoor fan

of--charge or low--pressure switch

 

will not start

 

 

 

Insufficient line voltage

Determine cause and correct

 

 

 

 

Incorrect or faulty wiring

Check wiring diagram and rewire correctly

 

 

 

 

Thermostat setting too low/too high

Reset Thermostat setting

 

 

 

 

Faulty wiring or circuit

Check wiring and repair or replace

 

Loose connections in compressor

 

 

 

 

 

 

Compressor motor burned out, seized, or

Determine cause

Compressor will not start but condenser fan

internal overload open

Replace compressor

 

 

Defective run capacitor, overload, or PTC (positive

 

runs

Determine cause and replace

temperature coefficient) thermistor

 

 

 

 

 

 

One leg of 3--phase power dead

Replace fuse or reset circuit breaker

 

Determine cause

 

 

 

 

 

 

Low input voltage

Determine cause and correct

 

 

 

Three-phase scroll compressor (size 030-

Scroll compressor is rotating in the wrong direction

Correct the direction of rotation by reversing the

060 unit) has a low pressure differential

3--phase power leads to the unit

 

 

 

 

 

Refrigerant overcharge or undercharge

Recover refrigerant, evacuate system, and re-

 

charge to capacities shown on rating plate

 

 

 

 

 

 

Defective compressor

Replace and determine cause

 

 

 

Compressor cycles (other than normally sat-

Insufficient line voltage

Determine cause and correct

 

 

isfying) cooling/heating calls

Blocked outdoor coil

Determine cause and correct

 

 

 

 

Defective run/start capacitor, overload or start relay

Determine cause and replace

 

 

 

 

Faulty outdoor fan motor or capacitor

Replace

 

 

 

 

Restriction in refrigerant system

Locate restriction and remove

 

 

 

 

Dirty air filter

Replace filter

 

 

 

 

Unit undersized for load

Decrease load or increase unit size

 

 

 

 

Thermostat temperature set too low

Reset Thermostat setting

Compressor operates continuously

 

 

Low refrigerant charge

Locate leak, repair, and recharge

 

 

 

 

Air in system

Recover refrigerant, evacuate system, and re-

 

charge

 

 

 

 

 

 

Outdoor coil dirty or restricted

Clean coil or remove restriction

 

 

 

 

Dirty air filter

Replace filter

 

 

 

 

Dirty indoor or outdoor coil

Clean coil

 

 

 

Excessive head pressure

Refrigerant overcharged

Recover excess refrigerant

 

 

Air in system

Recover refrigerant, evacuate system, and re-

 

 

charge

 

 

 

 

 

 

Indoor or outdoor air restricted or air short--cycling

Determine cause and correct

Head pressure too low

Low refrigerant charge

Check for leaks, repair and recharge

Restriction in liquid tube

Remove restriction

 

 

High Heat load

Check for source and eliminate

Excessive suction pressure

Reversing valve hung up or leaking internally

Replace valve

 

Refrigerant overcharged

Recover excess refrigerant

 

Dirty air filter

Replace filter

 

Low refrigerant charge

Check for leaks, repair and recharge

 

Metering device or low side restricted

Remove source of restriction

Suction pressure too low

Insufficient coil airflow

Check filter–replace if necessary

 

Temperature too low in conditioned area

Reset Thermostat setting

 

Outdoor ambient below 55°F (13°C)

Install low--ambient kit

 

Filter drier restricted

Replace

664B

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Bryant 664B installation instructions Troubleshooting Chart, Symptom Cause Remedy
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664B specifications

The Bryant 664B is a notable addition to the furnace market, recognized for its reliable performance and energy efficiency. Designed for residential applications, this model is particularly well-suited for homeowners looking to improve their heating systems without sacrificing comfort or efficiency.

One of the standout features of the Bryant 664B is its variable-speed blower motor. This technology allows the furnace to adjust its airflow based on the heating demands of the home, resulting in more consistent temperatures and reduced energy usage. By operating at different speeds, the furnace can provide quieter operation, ensuring that homeowners can enjoy a peaceful environment while the system works effectively.

Energy efficiency is a key characteristic of the Bryant 664B, boasting an Annual Fuel Utilization Efficiency (AFUE) rating of up to 80%. This rating indicates that the furnace converts 80% of the fuel it consumes into usable heat, making it a cost-effective choice for homeowners looking to lower their utility bills. The unit's efficient performance not only benefits the household budget but also contributes to a reduced carbon footprint, aligning with modern environmental expectations.

In terms of construction, the Bryant 664B features a robust cabinet that ensures durability and helps to minimize operational noise. Its compact design allows for easy installation in various home configurations, making it a versatile option for many homeowners. The furnace is equipped with advanced diagnostic capabilities, enabling easier troubleshooting and maintenance, thus reducing the potential for costly repairs.

Another noteworthy aspect of the Bryant 664B is its compatibility with smart home technology. Homeowners can integrate the furnace with their existing smart systems, providing enhanced control over their home’s heating environment. This integration allows for remote monitoring and adjustments, ensuring optimal comfort tailored to individual needs.

The Bryant 664B also includes a dependable warranty, providing added peace of mind for homeowners. This warranty underscores the manufacturer’s commitment to quality and customer satisfaction.

Overall, the Bryant 664B is an efficient, reliable, and technologically advanced heating solution. Its combination of variable-speed technology, energy efficiency, solid construction, and integration with smart home systems makes it a compelling option for anyone in need of a modern furnace. Its focus on comfort and performance solidifies its place in the competitive HVAC market.
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