F38 on a Honeywell Home security system usually means a fault on zone 38 — typically a bad, open, or dead-battery sensor. Here’s the fast way to clear it and know when to replace parts or the whole system.
F37 on a Honeywell Home / Resideo security system usually means the panel has lost communication with something it depends on – network, cellular, or a wireless device. Here’s how to clear it fast and when to call in help.
F36 on a Honeywell Home security system usually means the panel has lost reliable contact with the wireless sensor on zone 36. Here’s how to track it down and clear it fast.
F35 on a Honeywell home security system usually means Zone 35 is faulted. Here is how to find the bad sensor, clear the fault, and decide if it is worth fixing or upgrading.
No-nonsense walkthrough to clear the F34 communications fault on Honeywell / Resideo home security systems, plus when to fix it and when to move on.
Honeywell alarm showing F32 / FAULT 32? That’s a zone 32 sensor problem. Here’s the fast, real-world fix.
F31 on Honeywell Home security panels usually means a Zone 31 fault — here’s how to shut it up, find the bad sensor, and either fix it right or bypass it so you can arm the rest of the system.
F30 on a Honeywell Home security system usually means the panel has lost communication with a sensor, keypad, or communicator. Here’s how to clear it fast, like a tech.
F28 on a Honeywell Home security system is a communication fault with a key module, usually the cellular/Wi‑Fi or RF communicator. Here’s how to clear it fast, when it’s worth fixing, and what parts you might need.
F27 on a Honeywell Home security system is a communication fault on the alarm’s network module. Here’s how to get your monitoring and app connection back online fast.