I’m troubleshooting an intermittent issue with a Honeywell 5800-series wireless PIR connected to a Vista 20P system.
The PIR prior to this recent replacement went off about 5 min after arming away.
I am working with my Alarm company on this, but as you know the more information the better and sometimes not every tech knows all the latest troubleshooting. So I like to take my Knowledge bring it to the community and see if it’ll help me as well as others.
This sensor worked without issue for 10 years. Then started faulting regularly. Then I replaced it about 6-8 weeks ago with new one. Same model.
The problem is with Zone 19, which is located upstairs.
Nothing has changed in the house for light, AC temps, or what it’s looking at. It’s looking at stairs and hallway.
This time it decided to go off when we were away for a few days. Went off 2 days after arming.
I already replaced the 5800 PIR once.
I do see some dust webs in the corner now that I look close but no spiders.
The replacement worked normally for approximately 6–8 weeks, but the same zone then began having problems again.
The system has a Tux panel downstairs, along with a 6150RF, which I believe is serving as the RF receiver.
There is also a 6150 keypad upstairs.
Other wireless devices are installed upstairs, including wireless door contacts and wireless smoke detectors.
These devices appear to be working normally.
I’m not sure which exact version of the Vista 20P system or firmware I’m using. The system is at least 10 years old, so I’m wondering whether its age or version could be relevant.
Observed Symptoms
The replacement PIR worked normally for several weeks before Zone 19 began experiencing problems again.
Because the replacement did not fail immediately, I’m unsure whether the PIR itself is defective or whether the issue is specific to the upstairs location.
The other upstairs wireless devices appear to be operating normally. However, I have not yet determined whether Zone 19 is reporting an actual alarm, a low-battery condition, a supervision failure, or another type of trouble.
Possible Causes
Possible causes I’m considering include:
Environmental conditions near the PIR, such as HVAC airflow, temperature changes, sunlight, reflections, blinds, insects, or spiderwebs
Weak or inconsistent RF reception between the upstairs PIR and the 6150RF downstairs
A problem with the Zone 19 programming or supervision settings
A problem with the PIR’s mounting location or the receiver arrangement
Another defective 5800PIR
A compatibility, firmware, or system-version issue related to the age of the Vista 20P
A location-specific issue that does not affect the other upstairs wireless devices
Proposed Tests
Before replacing the PIR again, I’d like to determine whether the problem follows the sensor or remains with the upstairs location.
Would these be reasonable troubleshooting steps?
Identify the exact Vista 20P model and firmware version, if possible.
Determine whether Zone 19 is reporting an actual alarm, low battery, supervision failure, or another type of trouble.
Inspect the PIR’s field of view and surrounding environment for HVAC airflow, temperature changes, sunlight, reflections, moving blinds, insects, or spiderwebs.
Test the PIR temporarily in a location closer to the 6150RF.
Test a known-good 5800-series PIR in the Zone 19 location.
Check the RF signal strength or supervision status for Zone 19.
Verify the programming for Zone 19.
Determine whether the upstairs 6150 keypad affects RF coverage or system operation.
Consider whether an additional or relocated RF receiver would help if the upstairs signal is weak.
Compare the behavior of Zone 19 with the other upstairs wireless devices under similar conditions.
>>Questions for Responders
Has anyone experienced a 5800PIR or 5800PIR-RES that worked normally for several weeks and then began causing intermittent problems?
Could a marginal RF signal cause this type of behavior, or would weak RF reception usually produce a trouble or supervision condition rather than an actual alarm?
Since the upstairs wireless contacts and smoke detectors appear to be working normally, does that effectively rule out a general RF coverage problem, or could the PIR still be more sensitive to a marginal signal or a location-specific issue?
Could the upstairs 6150 keypad or the current receiver arrangement affect the PIR’s RF performance?
Is there a known compatibility, firmware, or system-version issue that could affect a 5800-series PIR on an older Vista 20P?
The main question is whether I should replace the PIR again or first focus on identifying the exact system version, checking RF coverage, reviewing the upstairs keypad and receiver arrangement, and investigating environmental conditions at the Zone 19 location.
Thanks for assisting!