Goodman Mfg GDS8, GHS8, GMS8 instruction manual Continuously

Models: GMS8 GHS8 GDS8

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TROUBLESHOOTING CHART

Symptoms of Abnormal

Associated

Fault Description(s)

Possible Causes

Corrective Action

Cautions and Notes

Operation

LED Code2

 

 

 

 

• Circulator blower runs

 

• Primary limit

• Insufficient conditioned air

• Check filters and

• Turn power OFF

continuously. No furnace

4

circuit is open.

over the heat exchanger.

ductwork for blockage.

prior to repair.

operation.

 

 

Blocked filters, restrictive

Clean filters or remove

 

• Integrated control module

4 FLASHES

 

ductwork, improper

obstruction.

• See Product

 

circulator blower speed,

 

Data Bulletin for

diagnostic LED is flashing

 

• Check circulator blower

 

 

or failed circulator blower.

allowable rise

FOUR (4) flashes.

 

 

speed and performance.

 

 

 

range and proper

 

 

 

 

Correct speed or replace

 

 

 

 

circulator speed.

 

 

 

 

blower if necessary.

 

 

 

 

 

 

 

 

 

 

 

• Induced draft blower and

 

• Flame sensed

• Short to ground in flame

• Correct short at flame

• Turn power OFF

circulator blower runs

5

with no call for

sense circuit.

sensor or in flame

prior to repair.

continuously. No furnace

 

heat.

 

sensor wiring

 

operation.

5 FLASHES

 

 

 

 

 

 

 

 

 

Integrated control module diagnostic LED is flashing FIVE (5) flashes.

 

• Furnace fails to operate.

 

• Rollout limit

• Flame rollout.

• Check burners for

• See “Vent/Flue

 

• Integrated control module

6

open.

• Misaligned burners,

proper alignment.

Pipe” section for

 

 

 

• Check flue and air inlet

piping details.

 

diagnostic LED is flashing

 

 

blocked flue and/or air

 

 

 

 

 

 

SIX (6) flashes.

6 FLASHES

 

inlet pipe, or failed

piping for blockage,

 

 

 

 

 

 

induced draft blower.

proper length, elbows,

 

 

 

 

 

 

• Loose or improperly

and termination.

• Replace induced

 

 

 

 

Correct as necessary.

draft blower with

 

 

 

 

connected wiring.

 

 

 

 

• Check induced draft

proper

 

 

 

 

 

 

 

 

 

 

replacement part.

 

 

 

 

 

blower for proper

 

 

 

 

 

 

 

 

 

 

 

 

performance.

 

 

 

 

 

 

 

Replace, if necessary.

 

 

 

 

 

 

 

• Tighten or correct

 

 

 

 

 

 

 

wiring connection.

 

 

 

• Normal furnace

 

• Flame sense

• Flame sensor is coated/

• Sand flame sensor is

• Turn power OFF

 

operation.

7

microamp signal is

oxidized.

coated/oxidized.

prior to repair.

 

• Integrated control

 

low.

• Flame sensor incorrectly

• Inspect for proper sensor

• Clean flame

 

 

 

 

module diagnostic LED

7 FLASHES

 

positioned in burner

alignment.

sensor with steel

 

is flashing SEVEN (7)

 

 

flame.

• Check inlet air piping for

wool.

 

flashes.

 

 

 

 

 

 

 

 

• Lazy burner flame due to

blockage, proper length,

• See “Vent/Flue

 

 

 

 

 

 

 

 

improper gas pressure or

elbows, and termination.

Pipe” section for

 

 

 

 

combustion air.

• Compare current gas

piping details.

 

 

 

 

 

 

 

 

 

 

 

 

pressure to rating plate

• See rating plate

 

 

 

 

 

info. Adjust as needed.

for proper gas

 

 

 

 

 

 

pressure.

 

 

 

 

 

 

 

 

 

• Induced draft blower runs

C

• Polarity of 115

• Polarity of 115 volt AC

• Review wiring diagram to

• Turn power OFF

 

continuously. No furnace

volt power is

power to furnace or

correct polarity.

prior to repair.

 

 

 

operation.

 

reversed.

integrated control module

• Verify proper ground.

 

 

 

• Integrated control module

 

 

is reversed.

 

 

 

CONTINUOUS

 

Correct if necessary.

 

 

 

 

 

 

 

 

diagnostic LED is flashing

FLASHING

 

• Poor unit ground.

• Check and correct wiring.

 

 

 

continuously.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• LED is steady on

steady on

• Normal operation.

 

 

 

 

2LED Flash code will cease if power to the control module is interrupted through the disconnect or door switch.

3Applies to GMS8/GDS8/GHS8 Models only.

IO-242C

30

05/05

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Goodman Mfg GDS8, GHS8, GMS8 instruction manual Continuously

GMS8, GHS8, GDS8 specifications

Goodman Manufacturing, a well-reputed name in the HVAC industry, offers a comprehensive range of heating and cooling solutions. Among their notable products are the GDS8, GHS8, and GMS8 series, each designed to meet diverse customer needs while providing exceptional performance and energy efficiency.

The Goodman GDS8 gas furnace is known for its remarkable efficiency and reliability. Boasting an AFUE (Annual Fuel Utilization Efficiency) rating of up to 80%, the GDS8 converts a significant portion of fuel into usable heat, ensuring lower energy bills for homeowners. This model features a multi-speed blower motor that optimizes airflow, enhancing temperature consistency throughout the home, and reducing noise levels during operation. The GDS8 comes equipped with a durable heat exchanger crafted from high-quality steel, ensuring longevity and optimal heat transfer.

On the other hand, the GHS8 series represents Goodman’s commitment to high-efficiency heating. With an AFUE rating of up to 96%, the GHS8 is engineered for maximum performance. Its two-stage heating system allows for better temperature control, enabling the furnace to operate quietly and efficiently. Another standout feature is the ComfortBridge technology, which enhances the system’s ability to communicate and adapt to the home’s specific heating needs. This feature optimizes energy usage and increases comfort levels in any environment.

The Goodman GMS8 model is an exceptional choice for homeowners looking for a reliable gas furnace with a focus on energy efficiency. Similar to its counterparts, the GMS8 also delivers an AFUE of up to 96.5%. This unit features an advanced modulating gas valve that adjusts heating output based on the temperature requirements, creating a consistent and comfortable indoor climate. The GMS8 is also equipped with a high-efficiency ECM blower motor, which reduces energy consumption while improving airflow.

All three models feature Goodman’s quality construction, including a heavy-gauge cabinet that minimizes noise and enhances durability. They also are backed by Goodman’s limited lifetime warranty on the heat exchanger and a 10-year limited warranty on parts, providing customers with peace of mind regarding their investment. These furnaces are designed with efficiency and comfort in mind, making the GDS8, GHS8, and GMS8 ideal choices for homeowners looking to enhance their indoor environment while keeping energy costs in check.