Goodman Furnace Repair: GMS8 Control and Ignition
If you smell gas or a CO alarm sounds, leave the home and call the gas utility or 911 from outside.
For Goodman furnace repair, contact an independent heating contractor with the model and counted flashes. RS6612006R7 documents GMS8/GDS8/GHS8 controls, including retry lockout and low flame signal. Those indications direct a model-specific diagnosis; they do not establish that an ignitor, sensor or board needs replacement.
Talk to a contractor about your Goodman furnace
Call (877) 565-3062One call reaches a contractor registered for your ZIP; ask the fee and the arrival window.
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HVAC Responder Editorial Team · Reviewed 2026-11-01 · Facts quoted from manufacturer documentation
Retry lockout differs from a weak flame signal
Record whether the furnace tries to light before stopping, or lights before losing the flame indication. The cited diagrams assign a retry/recycle lockout to one flash and low flame signal to seven. These are separate observations for the service call and require their own checks.
According to Goodman GMS8/GDS8/GHS8 service instructions (RS6612006R7):
SYSTEM LOCKOUT (RETRIES/RECYCLES EXCEEDED)
LOW FLAME SIGNAL
Keep ignition and pressure-switch observations separate
The manual identifies the hot-surface igniter in its control wiring and defines a pressure-switch-stuck-open indication separately. Report the start sequence without opening the cabinet to test these circuits. A replacement request should follow the contractor’s diagnosis of the installed model and wiring.
The Goodman GMS8/GDS8/GHS8 service instructions (RS6612006R7) also explains:
HOT SURFACE IGNITER
PRESSURE SWITCH STUCK OPEN
Discuss your Goodman furnace with a contractor
Call (877) 565-3062One call reaches a contractor registered for your ZIP; ask the fee and the arrival window.
Product category and model applicability
The manufacturer catalog identifies the product category below. The service examples on this page are limited to GMS8/GDS8/GHS8 manual families. Compare the full installed model with the cited manual before applying a signal or component description.
In the document “ Heating and Cooling Products | HVAC Systems | Goodman ”, Goodman lists this equipment under its Gas Furnaces
category.
Goodman warranty information to check
Goodman’s January 2026 warranty information lists registration and transfer exceptions by jurisdiction and installation date. Check the applicable certificate and local exception with the contractor. Do not assume an unregistered unit automatically has no coverage.
According to Goodman Warranty Information:
The following is a list of states and provinces that do not allow limited warranty coverage on your Goodman heating, ventilation, and air-conditioning (HVAC) system or a component of that system to be conditioned on registration:
What to tell the contractor
Give the GMS8/GDS8/GHS8 model, flashes with the pause between repeats, ignition-attempt history and any earlier sensor, igniter or control work.
Related repair and diagnostic guides
What happens when you call about your Goodman furnace
- Your call routes to an independent local contractor registered for your ZIP code.
- Ask the fee and the arrival window.
- The decision to hire stays with you.
One call reaches a contractor registered for your ZIP; ask the fee and the arrival window.
Sources and review date
- Goodman GMS8/GDS8/GHS8 service instructions (RS6612006R7), PDF · Captured source reviewed 2026-11-01
- Heating and Cooling Products | HVAC Systems | Goodman · Captured source reviewed 2026-11-01
- Goodman Warranty Information · Captured source reviewed 2026-11-01