ICP Error Code 3+5: Gas valve fault (modulating valve) (Furnace)
ICP error code 3+5 on a furnace means: Gas valve fault (modulating valve). It is also called ICP diagnostic code 3+5.
Homeowner? What ICP code 3+5 means for you
Call a technician Your furnace is reporting: Gas valve fault (modulating valve). The furnace has locked out or cannot run properly. One reset is fine; if the code comes back, it needs a licensed technician to find the cause.
Safe things you can check yourself
- Check the thermostat: right mode (Heat or Cool), set a few degrees past room temperature, and fresh batteries if it uses them.
- Make sure the unit has power: its on/off switch (often looks like a light switch near the unit) is ON and the breaker in the electrical panel is not tripped.
- Make sure the furnace front door or panel is closed properly; many furnaces will not run with the door switch open.
- Look at the air filter. If it is grey and clogged, replace it; a blocked filter causes many shutdowns.
- Outside, make sure the intake and exhaust pipes or vent cap are not blocked by snow, ice, leaves or a nest.
- Check that the gas valve next to the furnace is open (handle in line with the pipe). Do not force it.
- Try one reset: turn the power off for 30 seconds, then back on. If the code comes back, stop resetting and call a technician.
Call (647) 657-2977Book a service call
Licensed technicians serving Vaughan, Toronto and the GTA.
What does ICP error code 3+5 mean?
The modulating gas valve did not answer a command from the control, or power to the valve electronics was interrupted.
Applies to: ICP F9MAE / G9MAE modulating variable-speed condensing gas furnaces (060, 080, 100, 120 kBtu/h)
Common causes of ICP code 3+5
- Intermittent RED, YELLOW or ORANGE wire at the gas valve
- Loose PL8 connection
- Failed modulating gas valve or control
ICP models that use code 3+5
G9MAE0601714G9MAE0602120G9MAE0801714G9MAE0802120G9MAE1002122G9MAE1202422
Other ICP Furnace codes
ICP code 3+5: homeowner questions
What does ICP code 3+5 mean?
Gas valve fault (modulating valve). The modulating gas valve did not answer a command from the control, or power to the valve electronics was interrupted.
Is it safe to keep using my furnace with code 3+5?
It depends on the cause. The furnace has locked out or cannot run properly. One reset is fine; if the code comes back, it needs a licensed technician to find the cause.
Can I reset ICP code 3+5 myself?
You can try one reset (power off for 30 seconds, then on). If ICP code 3+5 comes back, the cause is still there and a licensed technician should check it.
Who can fix ICP code 3+5 near me?
Aurora Star Tech Inc. repairs ICP furnaces in Vaughan, Toronto and across the GTA. Call (647) 657-2977 or book a service call online.
Homeowner help: Furnace Not Turning On: What to Check · Furnace Blinking Light: What the Flash Codes Mean
Troubleshooting guides
- Blowing cold air All brands · Furnace
- No heat All brands · Furnace
- Short cycling All brands · Furnace
- Check inlet gas pressure ICP · Furnace
- Component self-test ICP · Furnace
- No heat - control does not respond to thermostat ICP · Furnace
- Reading and retrieving status codes ICP · Furnace
Source: ICP (F/G)9MAE Service and Technical Support Manual 440 04 4700 00, Figure 16 Troubleshooting Chart, p.34. Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.