Symptoms of Abnormal Operation

 

 

Diagnostic/Status

 

 

 

 

 

ComfortNet™

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fault Description

 

 

Thermostat Only

 

 

 

Possible Causes

 

 

Corrective Actions

 

 

Notes & Cautions

 

 

 

(Legacy & ComfortNet™ Thermostat)

 

 

LED Codes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Message

Code

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ Operation different than expected or no

 

d4

ξ

Invalid memory card

 

INVALID

d4

 

ξ

Shared data set on memory card

ξ

Verify shared data set is correct

ξ

Turn power OFF prior to

 

 

operation.

 

 

 

 

data.

 

MC DATA

 

 

 

 

has been rejected by integrated

 

for the specific model. Re-

 

repair

 

ξ Integrated control module LED display

 

 

 

 

 

 

 

 

 

 

 

 

control module

 

populate data using correct

ξ

Use memory card for the

 

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

memory card if required.

 

specific model.

 

 

provides d error code.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Insert memory card

 

ξ ComfortNet™ thermostat “Call for

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ

 

 

Service” icon illuminated.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BEFORE turning power

 

ξ ComfortNet™ thermostat scrolls “Check

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ON. Memory card may be

 

 

Furnace” message.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

removed after data is

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

loaded.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ

Turn power OFF before

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

removing memory card.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ

Error code will be cleared

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

once data is loaded.

 

ξ Furnace fails to operate.

 

b0

ξ

Circulator blower motor

 

MOTOR

b0

 

ξ

Loose wiring connection at

ξ

Tighten or correct wiring

ξ

Turn power OFF prior to

 

ξ Integrated control module LED display

 

 

 

 

is not running when it

 

NOT RUN

 

 

 

 

circulator motor power leads or

 

connection.

 

repair

 

0

 

 

 

 

 

should be running.

 

 

 

 

 

 

circulator motor power leads

ξ

Verify continuous circuit

ξ

Replace inductor with

 

 

provides b error code.

 

 

 

 

 

 

 

 

 

 

 

 

disconnected.

 

through inductor. Replace if

 

correct replacement part.

 

ξ ComfortNet™ thermostat “Call for

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Service” icon illuminated.

 

 

 

 

 

 

 

 

 

 

 

ξ Open circuit in inductor or loose

 

open or short circuit.

ξ

Replace circulator motor

 

ξ ComfortNet™ thermostat scrolls “Check

 

 

 

 

 

 

 

 

 

 

 

 

wiring connection at inductor (3/4

ξ

Check circulator blower motor.

 

with correct replacement

 

 

Furnace” message.

 

 

 

 

 

 

 

 

 

 

 

 

Hp and 1 Hp models only).

 

Replace if necessary.

 

part.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ Failed circulator blower motor.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ Furnace fails to operate.

 

b1

ξ

Integrated control

 

MOTOR

b1

 

ξ

Loose wiring connection at

ξ

Tighten or correct wiring

ξ

Turn power OFF prior to

 

ξ Integrated control module LED display

 

 

 

 

module has lost

 

COMM

 

 

 

 

circulator motor control leads.

 

connection.

 

repair

 

1

 

 

 

 

 

communications with

 

 

 

 

 

ξ

Failed circulator blower motor.

ξ

Check circulator blower motor.

ξ

Replace circulator motor

 

 

provides b error code.

 

 

 

 

circulator blower motor.

 

 

 

 

 

ξ Failed integrated control module.

 

Replace if necessary.

 

with correct replacement

 

ξ ComfortNet™ thermostat “Call for

 

 

 

 

 

 

 

 

 

 

 

 

 

Service” icon illuminated.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ

Check integrated control module.

 

part.

 

ξ ComfortNet™ thermostat scrolls “Check

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace if necessary.

ξ

Replace integrated control

 

 

Furnace” message.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

module with correct

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

replacement part.

56

ξ Furnace fails to operate.

 

b2

ξ

Circulator blower motor

 

MOTOR

b2

 

ξ

Incorrect circulator blower motor

ξ

Verify circulator blower motor

ξ

Turn power OFF prior to

 

ξ Integrated control module LED display

 

 

 

 

horse power in shared

 

MISMATCH

 

 

 

 

in furnace.

 

horse power is the same

 

repair

 

2

 

 

 

 

 

data set does not match

 

 

 

 

 

ξ

Incorrect shared data set in

 

specified for the specific furnace

ξ

Replace motor with correct

 

 

provides b error code.

 

 

 

 

circulator blower motor

 

 

 

 

 

 

integrated control module.

 

model. Replace if necessary.

 

replacement part.

 

ξ ComfortNet™ thermostat “Call for

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Service” icon illuminated.

 

 

 

 

horse power.

 

 

 

 

 

 

 

 

ξ

Verify shared data set is correct

ξ

Use memory card for the

 

ξ ComfortNet™ thermostat scrolls “Check

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

for the specific model. Re-

 

specific model

 

 

Furnace” message.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

populate data using correct

ξ

Insert memory card

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

memory card if required.

 

BEFORE turning power

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ON. Memory card may be

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

removed after data is

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

loaded.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ

Turn power OFF before

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

removing memory card.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ

Error code will be cleared

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

once shared data and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

motor horse power match.

 

ξ Furnace operates at reduced performance.

 

b3

ξ

Circulator blower motor

 

MOTOR

b3

 

ξ

Blocked filters.

ξ

Check filters for blockage.

ξ

Turn power OFF prior to

 

ξ Airflow delivered is less than expected.

 

 

 

 

is operating in a power,

 

LIMITS

 

 

 

ξ

Restrictive ductwork.

 

Clean filters or remove

 

repair.

 

ξ Integrated control module LED display

 

 

 

 

temperature, or speed

 

 

 

 

 

ξ

Undersized ductwork.

 

obstruction.

 

 

 

 

 

provides b3 error code.

 

 

 

 

limiting condition.

 

 

 

 

 

ξ

High ambient temperatures.

ξ

Check ductwork for blockage.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Remove obstruction. Verify all

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

registers are fully open.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ

Verify ductwork is appropriately

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

sized for system. Resize/replace

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ductwork if necessary.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ξ

See "Product Description" and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

"Location Requirements &

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Considerations" for furnace

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

installation requirements.

 

 

 

TROUBLESHOOTING CHART

Page 56
Image 56
Goodman Mfg MVC95, CVC9/95 installation instructions Invalid

MVC95, CVC9/95 specifications

Goodman Manufacturing has established itself as a leader in the HVAC industry, and among its stellar lineup, the Goodman CVC9/95 and MVC95 stand out for their remarkable features, technologies, and efficiency.

The Goodman CVC9/95 is a high-performance gas furnace, designed for homeowners seeking reliability and cost-effective heating solutions. It operates with an impressive 95% Annual Fuel Utilization Efficiency (AFUE), which means that a significant portion of the fuel it consumes is converted into heat. This level of efficiency not only contributes to lower energy bills but also reduces greenhouse gas emissions, making it an environmentally friendly choice.

One of the standout features of the CVC9/95 is its multi-speed ECM blower motor. This technology adjusts the airflow according to the heating demands of the home, ensuring consistent and comfortable temperatures. The ECM motor also operates quietly, enhancing the comfort of your living space without the disruptive noise often associated with traditional furnaces.

The MVC95, on the other hand, offers similar efficiency with its also 95% AFUE rating. This model is equipped with a patented ignition system that enhances reliability with minimal maintenance needs. Its durable construction includes a heavy-gauge steel cabinet and an insulated blower compartment that minimizes heat loss. This design not only supports optimal performance but also contributes to its longevity.

Both models come with a self-diagnostic control board that provides straightforward troubleshooting capabilities, making it easier for technicians to ensure that your system is operating at peak performance. This feature aids in timely maintenance, which is crucial for extending the lifespan of the unit.

Additionally, Goodman backs their products with a strong warranty, offering a lifetime limited warranty on the heat exchanger and a 10-year limited parts warranty. This assurance provides homeowners peace of mind regarding their investment.

In the landscape of HVAC solutions, the Goodman CVC9/95 and MVC95 models exemplify a commitment to quality, efficiency, and advanced technology. Whether for new constructions or replacements, these furnaces offer superior heating performance coupled with modern conveniences, making them an invaluable choice for homeowners seeking effective climate control solutions. With their low emissions and high efficiency, choosing Goodman means investing in both comfort and sustainability.