GOODMAN//Thermostat
Goodman GTST thermostat: built for communicating GOODMAN systems
The GTST is GOODMAN's Wi-Fi thermostat. GOODMAN intends it for its communicating systems, where the thermostat exchanges data both ways with the indoor unit and the outdoor unit. Before you buy, this page sets each GOODMAN family in our store against what GOODMAN's documents say about it.
The question this page answersDoes the GTST work with my GOODMAN equipment?
The GTST thermostat in our store
Its product page opens a price request. First, with your model numbers in hand, we check what GOODMAN says about your equipment.
Tool//Compatible?
Your equipment, and what GOODMAN says about it
Pick your equipment among the GOODMAN families in our store, or the communicating system GOODMAN names. The tool gives GOODMAN's answer and the document it comes from. When GOODMAN says nothing, the tool says so too.
GTST with a GLZS4B and an AMST air handler
R-32 central heat pump and its air handler
GOODMAN does not name them with the GTST. The GTST needs a communicating indoor unit and a communicating outdoor unit; on their pages, the GLZS4B and the AMST show "No" on the ComfortBridge line.
What the GOODMAN documents say
- TRC-13 installation module, valid configurationscommunicating indoor unit + communicating outdoor unitSource 3, p. 13
- GLZS4B and AMST product pages"No" on the "ComfortBridge Compatible" lineSource 6
- Line card PM-GLINE 09-26ComfortBridge: "N/A" for the GLZS4B and the AMSTSource 4, p. 3 and 4
For this central system, we suggest another thermostat before you buy.
See the GTST in our storeGOODMAN documents read on November 5, 2026. "GOODMAN does not say": GOODMAN's GTST documents do not name this equipment. That is neither a yes nor a no. The two documents differ: among modular blowers, the line card (09-26) names only the MBVK*00; the GTST product flyer (09-25) says "all Goodman communicating unitary equipment". Neither names a unit we sell for use with the GTST.
GOODMAN//The auxiliary output
Backup heat goes through a dry contact
The GTST has a single auxiliary output. Here is what GOODMAN publishes about it.
One output, three uses
GOODMAN's March 2026 catalogue describes an auxiliary output that can be set up as a secondary heat source, a dehumidifier or a humidifier (source 5, p. 70).
A dry contact
The installation module states that the Aux output is a dry contact, and that a 24 VAC control signal must be routed through it (source 3, p. 14).
GOODMAN//Specifications
The GTST, line by line
The values GOODMAN publishes, each with its document.
GOODMAN data, sources 1, 2, 5 and 7
| Published value | GTST | Source |
|---|---|---|
| Name given by GOODMAN | "Goodman GTST Connected Thermostat" | 1 |
| Connection | built-in Wi-Fi, Goodman Home app on a phone or tablet | 1, 2 and 5 |
| Voice control | supported | 1 |
| Schedule | seven days, up to four events a day | 1 and 2 |
| Communication with the equipment | "bi-directional communications protocol" | 5 |
| Compliance marks | "FCC Certified/UL Listed"; licence-exempt radio device complying with ISED Canada RSS | 5 and 7 |
| Trim plate | PSPAC-WPM-L, optional | 5 |
App name: the GTST product flyer (p. 2) and GOODMAN's catalogue refer to the Goodman Home app; we use that name. Neither the power the thermostat draws nor its Wi-Fi band appears in the documents read (sources 1 to 3, 5 and 7).
Compare//The intended system
The system GOODMAN built the GTST for, against the R-32 GLZS4B + AMST pair
The GTST is the only thermostat we carry from GOODMAN, so the useful comparison sets the system GOODMAN intends it for against the GLZS4B + AMST pair; the GLZS4B is coming soon to our store.
| From GOODMAN's documents and our store | System intended for the GTST | R-32 GLZS4B + AMST pair |
|---|---|---|
| Outdoor unit | SD, side discharge | GLZS4B |
| Compressor | variable speed ("inverter") | single-stage |
| Indoor unit | MBVK*00 modular blower | AMST air handler |
| Named by GOODMAN with the GTST | yes | no |
| In our store | no | AMST air handler: yes; GLZS4B: coming soon |
Intended system: GTST page and line card, p. 4 (sources 1 and 4). GLZS4B compressor: SS-GLZS4B-R32 sheet, p. 2 (source 9).
Did you know//GOODMAN documents
The GTST up close: terminals, wire and screen
Four terminals: 1, 2, C and R
On the GTST, GOODMAN labels four terminals, 1, 2, C and R, to be wired to the terminals with the same names on the indoor unit. That is communicating-system wiring.
Source 3, p. 9125 ft of wire, at most
Between the GTST and the equipment, GOODMAN sets a maximum run of 125 ft, or 38 m, in 18-gauge wire.
Source 3, p. 9 and 13A 3.5 in LCD screen
GOODMAN's March 2026 catalogue describes a backlit 3.5 in TFT LCD screen, or 8.9 cm.
Source 5, p. 70AirGreen × GOODMAN//Who brings what
The GTST: GOODMAN's documents, AirGreen's check
What GOODMAN brings
- A Wi-Fi thermostat, set from the Goodman Home app on a phone or tablet
- A seven-day schedule, up to four events a day
- Two-way communication with communicating GOODMAN equipment
- An auxiliary output for backup heat, a humidifier or a dehumidifier
What AirGreen brings
- An answer before you buy: GOODMAN names none of the units in our store with the GTST
- Checking the exact model numbers of the indoor and outdoor units
- Installation by our refrigeration technicians, under AirGreen's RBQ licence 5645-9605-01
- Commissioning the GTST on a communicating GOODMAN system
Questions//GTST thermostat
Questions about the GTST thermostat
Does the GTST thermostat work with the GLZS4B or GLZS4M central system?
GOODMAN does not name them with the GTST. Its installation module calls for a communicating indoor unit and a communicating outdoor unit, and GOODMAN's pages for the GLZS4B, the GLZS4M and the AMST air handler show "No" on the ComfortBridge line. For these central systems, we pick another thermostat with you.
And with a GOODMAN wall, multi-zone, cassette or ducted unit?
GOODMAN's brochures for these units, from 2018 to 2024, do not name the GTST, and neither GOODMAN's line card nor its catalogue lists any MSH, MSC or MST model. Without a word from GOODMAN, we do not promise it will work: these units keep the control GOODMAN supplies with them.
How do I know if my equipment is communicating?
From the exact model of each unit. With the GTST, GOODMAN's line card names the SD side-discharge inverter outdoor unit and the MBVK*00 modular blowers. We read the models of the indoor and outdoor units before talking thermostats.
Is the GTST available in French?
Partly. GOODMAN's March 2026 catalogue lists English, Spanish and French, adding "Goodman GTST home app only": in the app only. For the thermostat screen itself, GOODMAN does not state the language.
What temperature range does GOODMAN print for the GTST?
The GTST product flyer prints "COOLING (AC/HP): 0°F DB - 115°F DB" and "HEATING (HP): -10°F DB - 70°F DB". DB stands for dry bulb; GOODMAN does not say whether it refers to outdoor air.
Read next//The GOODMAN space
Related pages
A GTST in your home: we start with your model numbers
If GOODMAN names your indoor and outdoor units with the GTST, we wire it in. If not, we tell you before you buy.
Sold and installed by AirGreen.Montreal, Laval, Longueuil, the South Shore and the North Shore.
An AirGreen technician checks the model numbers of the indoor and outdoor units on site before proposing a thermostat.
Subclasses 15.8, 15.10 and 16. Gas and oil work is done by a partner holding the required licence.
The equipment is GOODMAN-branded. AirGreen sells it, installs it and services it across Greater Montreal.
Sources
- GOODMAN, "Goodman GTST Connected Thermostat" product page, goodmanmfg.com, read November 5, 2026.
- GOODMAN, GTST product flyer, code PF-GDMN_GTST_09-25, p. 1 and 2.
- GOODMAN, "Goodman GTST Connected Thermostat Installation & Commissioning", training module TRC-13, © 2026, p. 9, 13 and 14.
- GOODMAN, residential products line card, code PM-GLINE 09-26, p. 3 and 4.
- GOODMAN, residential products catalogue, code CT-GOODMAN 03-26, p. 70.
- GOODMAN, GLZS4B, GLZS4M and AMST (R-32) product pages, goodmanmfg.com, read November 5, 2026: "ComfortBridge Compatible" line.
- GOODMAN, GTST homeowner guide, code HG-GDMNGTST_09-25: ISED Canada compliance statement.
- GOODMAN, ductless brochures CB-DL-1921S-HP 03-21, 06-21 and 05-24, and CB-GDuctless2018-FR 10.18, kept in AirGreen's files: none names the GTST.
- GOODMAN, SS-GLZS4B-R32 specification sheet, 08/26, p. 2: "Single Stage" compressor.
Read and dated by AirGreen on November 5, 2026. Values are the ones GOODMAN publishes; a real installation can differ.