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TROUBLESHOOTING
Symptom
No Heat/No Cool/No Fan
(common problems)
No Heat
No Cool
Heat, Cool or Fan Runs
Constantly
Furnace (Air Conditioning)
Cycles Too Fast or Too Slow
(narrow or wide temperature
swing)
Thermostat Setting and
Thermostat Thermometer
Disagree
Blank Display and/or Keypad
Not Responding
LIMITED WARRANTY
Your Research Products Corporation Aprilaire
Research Products Corporation's exclusive obligation under this warranty shall be to supply, without charge, a replacement for any thermostat which is found to be defective within a two (2) year period and which
is returned, together with the date of installation, no later than thirty (30) days after said two (2) year period by you to either your original supplier or to Research Products Corporation, Madison, Wisconsin 53701.
THIS WARRANTY SHALL NOT OBLIGATE RESEARCH PRODUCTS CORPORATION FOR ANY LABOR COSTS AND SHALL NOT APPLY TO DEFECTS IN WORKMANSHIP OR MATERIALS FURNISHED BY
YOUR INSTALLER AS CONTRASTED TO DEFECTS IN THE THERMOSTAT ITSELF.
IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE SHALL BE LIMITED IN DURATION TO THE AFORESAID TWO YEAR PERIOD. RESEARCH PRODUCTS CORPORATION'S
LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES, OTHER THAN DAMAGES FOR PERSONAL INJURIES, RESULTING FROM ANY BREACH OF THE AFORESAID IMPLIED WARRANTIES OR THE
ABOVE LIMITED WARRANTY IS EXPRESSLY EXCLUDED. THIS LIMITED WARRANTY IS VOID IF DEFECT(S) RESULT FROM FAILURE TO HAVE THIS THERMOSTAT INSTALLED BY A QUALIFIED HEATING AND AIR
CONDITIONING CONTRACTOR. IF THE LIMITED WARRANTY IS VOID DUE TO FAILURE TO USE A QUALIFIED CONTRACTOR, ALL DISCLAIMERS OF IMPLIED WARRANTIES SHALL BE EFFECTIVE UPON INSTALLATION.
Some states do not allow limitations on how long an implied warranty lasts or the exclusion or limitation of incidental or consequential damages, so the above exclusion or limitations may not apply to you.
This warranty gives you specifi c legal rights and you my also have other rights which vary from state to state.
WARRANTY REGISTRATION
Please... Take a few minutes to visit us online at www.aprilaire.com to register your Aprilaire product. If you do not have online access,
please mail a postcard with your name, address, phone number, product or model purchased, date of purchase and dealer name to:
YOUR WARRANTY REGISTRATION INFORMATION WILL NOT BE SOLD OR SHARED OUTSIDE OF THIS COMPANY.
61000473 6.06
P.O. BOX 1467 • Madison, WI 53701-1467 • Phone: 800/334-6011 • Fax: 608/257-4357 • www.aprilairecontractor.com
B2204148B
6
(CONTINUED)
Possible Cause
1. Blown fuse or tripped circuit breaker.
2. Furnace power switch to OFF.
3. Furnace blower compartment door or
panel loose or not properly installed.
1. Pilot light not lit.
2. System Switch not set to HEAT.
3. Loose connection to thermostat or
system.
4. Furnace Lock-Out Condition. Heat may
also be intermittent.
5. Heating system requires service or
thermostat requires replacement.
1. System Switch not set to COOL.
2. Loose connection to thermostat or
system.
3. Cooling system requires service or
thermostat requires replacement.
1. Possible short in wiring.
2. Possible short in thermostat.
3. Possible short in heat/cool/fan system.
4. Fan Switch set to Fan On.
The location of the thermostat and/or the
size of the Heating (Cooling) System may
be infl uencing the cycle rate.
Thermostat thermometer setting requires
adjustment.
Voltage spike or static discharge.
®
Thermostat unit is expressly warranted for two (2) years from date of installation to be free from defects in materials and workmanship.
Research Products Corporation, P.O. BOX 1828, Madison, WI 53701
RESEARCH PRODUCTS CORPORATION
Corrective Action
1. Replace fuse or reset breaker.
2. Turn switch to ON.
3. Replace door panel in proper position to engage safety interlock or door switch.
1. Re-light pilot.
2. Set System Switch to HEAT and raise setpoint above room temperature.
3. Verify thermostat and system wires are securely attached.
4. Many furnaces have safety devices that shut down when a lock-out condition
occurs. If the heat works intermittently, contact the furnace manufacturer or local
service person for assistance.
5. Diagnostic: Set System Switch to HEAT and raise the setpoint above room
temperature. Within a few seconds, the thermostat should make a soft click
sound. This sound usually indicates the thermostat is operating properly. If the
thermostat does not click, try the reset operation listed on page 5. If the thermostat
does not click after being reset contact your heating and cooling service person or
place of purchase for a replacement. If the thermostat clicks, contact the furnace
manufacturer or a service person to verify the heating is operating correctly.
1. Set System Switch to COOL and lower setpoint below room temperature.
2. Verify thermostat and system wires are securely attached.
3. Same procedure as diagnostic for No Heat condition except set the thermostat to
COOL and lower the setpoint below the room temperature. There may be up to a fi ve
minute delay before the thermostat clicks in Cooling.
1. – 4. Check each wire connection to verify they are not shorted or touching together.
No bare wire should stick out from under terminal screws. Try resetting the
thermostat as described on page 5. If the condition persists, the manufacturer of
your system or service person can instruct you on how to test the Heat/Cool system
for correct operation. If the system operates correctly, replace the thermostat.
Digital thermostats normally provide precise temperature control and may cycle faster
than some older mechanical models. A faster cycle rate means the unit turns on and
off more frequently but runs for a shorter time so there is no increase in energy use.
If you would like to increase the cycle time, clip Jumper W-905 as mentioned in the
instructions for Hydronic Heating Systems. It is not possible to shorten the cycle time.
If an acceptable cycle rate is not achieved as received or by clipping W-905 contact a
local service person for additional suggestions.
The thermometer can be adjusted +/- 3 degrees. See Select Temperature Display
Adjustment (#3 in the Confi guration Menu section).
Use the Reset Operation listed on page 5.
Printed in China
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